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Fractions & Decimals

Fractions & Decimals

Adding & Subtracting Fractions Examples

Example 1

3/4 + 2/5 =

The LCM of 4 and 5 is 20, so we need to convert the fractions so they each have a denominator of 20.

3/4 = 15/20 and 2/5 = 8/20

Example 2

7/8 - 2/3 =

The LCM of 8 and 3 is 24, so we need to convert each fraction to one with a denominator of 24

7/8 = 21/24 and 2/3 = 16/24

Example 3

4/7 + 2/6

The LCM of 7 and 6 is 42, so we need to convert each fraction to one with a denominator of 42.

8/9 - 2/3 and 8/9 - 6/9 =

Example 4

8/9 - 2/3 =

The LCM of 9 and 3 is 9. Since the first fraction already has a denominator of 9, we only need to convert the second one.

2/3 = 6/9

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