Rewriting Fractions as Decimals

Oct 13, 2025 by talynt.org 135 views

Introduction

In mathematics, fractions and decimals are two ways to represent the same value. A fraction is a way to express a part of a whole as a ratio of two numbers, while a decimal is a way to express a number in a base-10 system. In this article, we will focus on rewriting fractions as decimals and classifying the decimals as terminating, non-terminating, repeating, or non-repeating.

Rewriting Fractions as Decimals

To rewrite a fraction as a decimal, we need to divide the numerator by the denominator. Let's start with the first fraction: $\frac{3}{8}$ .

$\frac{3}{8}$

To rewrite $\frac{3}{8}$ as a decimal, we need to divide 3 by 8.

3 ÷ 8 = 0.375

So, $\frac{3}{8}$ as a decimal is 0.375.

Classifying Decimals

Now that we have rewritten the fraction as a decimal, we need to classify the decimal as terminating, non-terminating, repeating, or non-repeating.

Terminating Decimals

A terminating decimal is a decimal that has a finite number of digits after the decimal point. For example, 0.5, 0.25, and 0.125 are all terminating decimals.

Non-Terminating Decimals

A non-terminating decimal is a decimal that has an infinite number of digits after the decimal point. For example, 0.333..., 0.666..., and 0.999... are all non-terminating decimals.

Repeating Decimals

A repeating decimal is a decimal that has a repeating pattern of digits after the decimal point. For example, 0.142857142857... and 0.272727... are all repeating decimals.

Non-Repeating Decimals

A non-repeating decimal is a decimal that does not have a repeating pattern of digits after the decimal point. For example, 0.123456... and 0.987654... are all non-repeating decimals.

Classifying the Decimal 0.375

Now that we have classified the decimals, let's classify the decimal 0.375.

The decimal 0.375 has a finite number of digits after the decimal point, so it is a terminating decimal.

Rewriting Repeating Decimals using Bar Notation

If a decimal repeats, we can rewrite it using bar notation. Bar notation is a way to represent a repeating decimal using a bar over the repeating part.

Example: 0.142857142857...

The decimal 0.142857142857... repeats, so we can rewrite it using bar notation as follows:

0.142857142857... = 0.14̄2857

In this example, the bar over the 2857 indicates that the pattern 2857 repeats indefinitely.

Conclusion

In this article, we have rewritten fractions as decimals and classified the decimals as terminating, non-terminating, repeating, or non-repeating. We have also learned how to rewrite repeating decimals using bar notation. By understanding how to rewrite fractions as decimals and classify the decimals, we can better understand the properties of fractions and decimals.

Examples and Exercises

Example 1: $\frac{1}{3}$

Rewrite $\frac{1}{3}$ as a decimal and classify the decimal.

To rewrite $\frac{1}{3}$ as a decimal, we need to divide 1 by 3.

1 ÷ 3 = 0.333...

So, $\frac{1}{3}$ as a decimal is 0.333... The decimal 0.333... repeats, so we can rewrite it using bar notation as follows:

0.333... = 0.3̄33

The decimal 0.333... is a repeating decimal.

Example 2: $\frac{2}{5}$

Rewrite $\frac{2}{5}$ as a decimal and classify the decimal.

To rewrite $\frac{2}{5}$ as a decimal, we need to divide 2 by 5.

2 ÷ 5 = 0.4

So, $\frac{2}{5}$ as a decimal is 0.4. The decimal 0.4 is a terminating decimal.

Exercise 1: $\frac{3}{7}$

Rewrite $\frac{3}{7}$ as a decimal and classify the decimal.

To rewrite $\frac{3}{7}$ as a decimal, we need to divide 3 by 7.

3 ÷ 7 = 0.428571428571...

So, $\frac{3}{7}$ as a decimal is 0.428571428571... The decimal 0.428571428571... repeats, so we can rewrite it using bar notation as follows:

0.428571428571... = 0.42̄8571

The decimal 0.428571428571... is a repeating decimal.

Exercise 2: $\frac{4}{9}$

Rewrite $\frac{4}{9}$ as a decimal and classify the decimal.

To rewrite $\frac{4}{9}$ as a decimal, we need to divide 4 by 9.

4 ÷ 9 = 0.444444...

So, $\frac{4}{9}$ as a decimal is 0.444444... The decimal 0.444444... repeats, so we can rewrite it using bar notation as follows:

0.444444... = 0.4̄44

The decimal 0.444444... is a repeating decimal.

Glossary

Terminating decimal: A decimal that has a finite number of digits after the decimal point.
Non-terminating decimal: A decimal that has an infinite number of digits after the decimal point.
Repeating decimal: A decimal that has a repeating pattern of digits after the decimal point.
Non-repeating decimal: A decimal that does not have a repeating pattern of digits after the decimal point.
Bar notation: A way to represent a repeating decimal using a bar over the repeating part.

References

[1] "Decimal Representation of Fractions" by Math Open Reference
[2] "Terminating and Non-Terminating Decimals" by Khan Academy
[3] "Repeating Decimals" by Purplemath

About the Author

Introduction

In our previous article, we discussed how to rewrite fractions as decimals and classify the decimals as terminating, non-terminating, repeating, or non-repeating. In this article, we will answer some frequently asked questions about rewriting fractions as decimals and classifying the decimals.

Q: How do I know if a decimal is terminating or non-terminating?

A: To determine if a decimal is terminating or non-terminating, you need to divide the numerator by the denominator. If the result is a finite number of digits after the decimal point, then the decimal is terminating. If the result is an infinite number of digits after the decimal point, then the decimal is non-terminating.

Q: How do I know if a decimal is repeating or non-repeating?

A: To determine if a decimal is repeating or non-repeating, you need to look for a repeating pattern of digits after the decimal point. If you see a repeating pattern, then the decimal is repeating. If you don't see a repeating pattern, then the decimal is non-repeating.

Q: Can I rewrite a repeating decimal using bar notation?

A: Yes, you can rewrite a repeating decimal using bar notation. To do this, you need to place a bar over the repeating part of the decimal.

Q: How do I rewrite a fraction as a decimal?

A: To rewrite a fraction as a decimal, you need to divide the numerator by the denominator.

Q: What is the difference between a terminating decimal and a non-terminating decimal?

A: A terminating decimal is a decimal that has a finite number of digits after the decimal point. A non-terminating decimal is a decimal that has an infinite number of digits after the decimal point.

Q: What is the difference between a repeating decimal and a non-repeating decimal?

A: A repeating decimal is a decimal that has a repeating pattern of digits after the decimal point. A non-repeating decimal is a decimal that does not have a repeating pattern of digits after the decimal point.

Q: Can I have a decimal that is both terminating and repeating?

A: No, you cannot have a decimal that is both terminating and repeating. A decimal can be either terminating or non-terminating, but not both. Similarly, a decimal can be either repeating or non-repeating, but not both.

Q: How do I determine if a decimal is terminating or non-terminating?

Q: How do I determine if a decimal is repeating or non-repeating?

Q: Can I have a decimal that is both non-terminating and non-repeating?

A: Yes, you can have a decimal that is both non-terminating and non-repeating. For example, the decimal 0.123456... is non-terminating and non-repeating.

Q: Can I have a decimal that is both terminating and non-repeating?

A: Yes, you can have a decimal that is both terminating and non-repeating. For example, the decimal 0.5 is terminating and non-repeating.

Q: Can I have a decimal that is both non-terminating and repeating?

A: Yes, you can have a decimal that is both non-terminating and repeating. For example, the decimal 0.333... is non-terminating and repeating.

Q: Can I have a decimal that is both terminating and repeating?

Conclusion

In this article, we have answered some frequently asked questions about rewriting fractions as decimals and classifying the decimals. We have also discussed the differences between terminating and non-terminating decimals, and repeating and non-repeating decimals. By understanding these concepts, you can better understand the properties of fractions and decimals.

Glossary

Terminating decimal: A decimal that has a finite number of digits after the decimal point.
Non-terminating decimal: A decimal that has an infinite number of digits after the decimal point.
Repeating decimal: A decimal that has a repeating pattern of digits after the decimal point.
Non-repeating decimal: A decimal that does not have a repeating pattern of digits after the decimal point.
Bar notation: A way to represent a repeating decimal using a bar over the repeating part.

References

[1] "Decimal Representation of Fractions" by Math Open Reference
[2] "Terminating and Non-Terminating Decimals" by Khan Academy
[3] "Repeating Decimals" by Purplemath

About the Author

The author is a mathematics educator with a passion for teaching and learning. They have a strong background in mathematics and have taught a variety of math courses, including algebra, geometry, and calculus. They are committed to providing high-quality educational resources to students and teachers alike.