Subtracting Unlike Fractions with Renaming

What steps do you need to take before you add or subtract fractions with unlike denominators?

• Find a common denominator and then add the denominators.

• Find a common denominator and make equivalent fractions.

• Multiply the numerators and denominators.

• Rename the fractions to improper fractions

Subtract and Simplify: 5 1/6 - 2 7/8

• 2 7/24

• 3 17/24

• 3 7/24

Subtract & Simplify: 7 3/8 - 4 5/6 =

• 2 13/24

• 3 13/24

• 2 11/24

Subtract & Simplify: 14 1/4 - 10 5/6

• 3 13/12

• 3 7/12

• 3 5/12

Subtract & Simplify: 3 1/15 - 1 4/5 =

• 1 4/15

• 1 11/15

• 2 4/15

• 2 11/15

5/6 - 1/7

• 29/42

• 28/42

• 4/42

2/3 - 1/2

• 1/6

• 1/5

• 5/6

When you add or subtract fractions with unlike denominators you..

• Find the GCF to change your denominator

• Change the denominator by picking a random number then divide

• Find the LCD to change your denominator

4/5 - 1/20 (make sure to simplify)

• 3/4

• 20/15

• 3/15

8/9 - 1/3 = 

• 7/6

• 5/9

• 2/3

• 8/27