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Fractions Decimals Mixed number to improper fraction Numerator and denominatorHere you will learn about converting fractions to decimals using division and using a calculator.

Students will first learn about converting fractions to decimals as part of number and operations fractions in 4th grade. They expand their knowledge of converting fractions to decimals as part of the number system in 7th grade.

Converting** fractions to decimals** is representing a fraction as a decimal without changing its value.

For example,

\cfrac{1}{4}=0.25

\cfrac{1}{8}=0.125

\cfrac{2}{7}=0.2857142857…

3 \cfrac{1}{5}=3.2

How does this relate to 7th grade math?

**7th grade – The Number System (7.NS.2d)**Convert a rational number to a decimal using long division; know that the decimal form of a rational number terminates in 0 s or eventually repeats.

In order to convert from a fraction to a decimal:

**Ensure the fraction is written with just a numerator and a denominator. If needed convert the mixed number to an improper fraction.****Divide the numerator by the denominator.****State the answer clearly in the form ‘fraction’=’decimal.’**

Use this quiz to check your grade 4 to 6 students’ understanding of converting fractions, decimals and percents. 10+ questions with answers covering a range of 4th, 5th and 6th grade topics to identify areas of strength and support!

DOWNLOAD FREEUse this quiz to check your grade 4 to 6 students’ understanding of converting fractions, decimals and percents. 10+ questions with answers covering a range of 4th, 5th and 6th grade topics to identify areas of strength and support!

DOWNLOAD FREEConvert \cfrac{1}{2} to a decimal.

**If needed convert the mixed number to an improper fraction.**

There is no need to convert as the fraction is already in the correct form.

2**Divide the numerator by the denominator.**

1 \div 2 \quad You can use long division here.

3**State the answer clearly in the form ‘fraction’=’decimal.’**

\cfrac{1}{2} = 0.5

Convert \cfrac{3}{8} \, to a decimal.

**If needed convert the mixed number to an improper fraction.**

There is no need to convert as the fraction is already in the correct form.

**Divide the numerator by the denominator.**

3 \div 8

**State the answer clearly in the form ‘fraction’=’decimal.’**

\cfrac{3}{8}=0.375

Convert \cfrac{7}{5} \, to a decimal.

**If needed convert the mixed number to an improper fraction.**

There is no need to convert as the fraction is already an improper fraction.

**Divide the numerator by the denominator.**

7 \div 5

**State the answer clearly in the form ‘fraction’=’decimal.’**

\cfrac{7}{5}=1.4

Convert 3 \cfrac{1}{4} \, to a decimal.

**If needed convert the mixed number to an improper fraction.**

You need to convert this mixed number to an improper fraction.

3 \cfrac{1}{4}= \cfrac{13}{4}

**Divide the numerator by the denominator.**

13\div{4}

**State the answer clearly in the form ‘fraction’=’decimal.’**

3 \cfrac{1}{4}=3.25

Convert \cfrac{2}{9} \, to a decimal.

**If needed convert the mixed number to an improper fraction.**

There is no need to convert as the fraction is already in the correct form.

**Divide the numerator by the denominator.**

2 \div 9

You will notice here that the 2 is repeated and will continue to be repeated. This is therefore a recurring, or repeating decimal and can be shown in the form.

0.\overline{2}

**State the answer clearly in the form ‘fraction’=’decimal.’**

\cfrac{2}{9}=0 . \overline{2}

Convert 2\cfrac{1}{7} \, to a decimal.

**If needed convert the mixed number to an improper fraction.**

You need to convert this mixed number to an improper fraction.

2\cfrac{1}{7}=\cfrac{15}{7}

**Divide the numerator by the denominator.**

15 \div 7 \quad You can use long division here.

You will notice here that the numbers 1 \, 4 \, 2 \, 8 \, 5 \, 7 after the decimal place are repeated and will continue to be repeated.

This is therefore a repeating decimal and can be shown in the form 0.\overline{142857}, so the whole decimal can be shown as 2.\overline{142857}

**State the answer clearly in the form ‘fraction’=’decimal.’**

2\cfrac{1}{7}=2 . \overline{142857}

You can perform a fraction to decimal conversion on a calculator by dividing the numerator by the denominator as a simple division equation. Another way is by inputting the fraction into your calculator and then pressing the [s ⇔ d] button.

For example, convert \cfrac{5}{4} to a decimal.

**Press the fraction button on the left side of your calculator.**

**Input the numbers and press the = button.**

**Press the [** s ⇔ d **] button to have it shown as a decimal.**

Therefore \cfrac{5}{4}=1.25

- Students will need to have a strong foundation in division and specifically the standard algorithm of division, or long division. Students should also understand the terms dividend and divisor. Review if needed before starting this topic.

- Begin with fractions that convert to simple decimal numbers ending in the tenths, hundredths, or thousandths place. Then move on to fractions that convert to more complex terminating decimals before moving onto fractions that convert to repeating decimals.

- Once students have mastered the calculations, move on to higher-level worksheets that provide them with word problems to provide a real-world context to the topic, which will deepen their understanding. For example, give students a division problem that requires them to use fraction to decimal conversion to calculate a percentage.

**Incorrectly converting between a mixed number and an improper fraction**

Not correctly converting between numbers in different forms. For example, mixed numbers and improper fractions or forgetting to convert to an improper fraction and using the fractional part of a mixed number only.

**Making mistakes when dividing**

Incorrectly using the standard algorithm of division (or long division).

**Flipping the division order**

Incorrectly dividing the denominator (bottom number) by the numerator (top number), not the other way around.

For example, \cfrac{5}{7} \, means 5 \div 7 not 7 \div 5.

1. Convert \cfrac{1}{4} \, to a decimal.

1.4

0.25

4

0.4

1\div4 = 0.25

2. Convert \cfrac{7}{8} \, to a decimal.

1 . \overline{142857}

0.78

0.875

7.8

7\div8 = 0.875

3. Convert \cfrac{7}{4} \, to a decimal.

1.75

1\cfrac{3}{4}

7.4

0. \overline{751428}

7\div4 = 1.75

4. Convert 7\cfrac{3}{5} \, to a decimal.

4.2

\cfrac{21}{5}

7.35

7.6

Converting to an improper fraction gives \cfrac{38}{5}, then 38\div5 = 7.6

5. Convert \cfrac{4}{9} \, to a decimal.

0.4

0.44

0.444

0. \overline{4}

Dividing 4\div9 gives the repeating decimal 0. \overline{4}. The line above the 4 represents the 4 repeated infinitely.

6. Convert \cfrac{2}{11} \, to a decimal.

0.18

0.181818

0. \overline{18}

5.5

Dividing 2\div11 gives the repeating decimal 0. \overline{18}. The line above the 1 and 8 represents the 1 and 8 being repeated infinitely.

Mixed fractions, also called mixed numbers, are numbers that contain a whole number and a proper fraction. For example, 2\frac{1}{2} is a mixed fraction.

To convert a fraction to a decimal, divide the numerator by the denominator. If the fraction is a mixed number, be sure to convert it to an improper fraction first.

Method 1: Divide the numerator by the denominator as a simple division equation **or** Method 2: Press the fraction button on the left side of your calculator, input the numbers and press the = button, then press the [s ⇔ d] button to have the fraction shown as its decimal equivalent.

- Arithmetic
- Properties of equality
- Addition and subtraction

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