Adding & Subtracting Fractions Examples

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

and

Now, add the numerators, keep the denominator

Since this is an improper fraction, change it to a mixed number

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

and

Next, subtract the numerators and keep the denominator

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

and

Now add the numerators and keep the denominator

The numerator and denominator both can be reduced by 2

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.

Subtract the numerators and keep the denominator