Add 7/12 and 75/72, Solve 7/12 + 1 3/72 as a fraction

Add 7/12 and 75/72

1^st number: 7/12, 2^nd number: 1 3/72

7/12 + 75/72 is 13/8.

Find the least common denominator or LCM of the two denominators:
LCM of 12 and 72 is 72

Next, find the equivalent fraction of both fractional numbers with denominator 72
For the 1st fraction, since 12 × 6 = 72,
7/12 = 7 × 6/12 × 6 = 42/72
Likewise, for the 2nd fraction, since 72 × 1 = 72,
75/72 = 75 × 1/72 × 1 = 75/72
Add the two like fractions:
42/72 + 75/72 = 42 + 75/72 = 117/72
117/72 simplified gives 13/8
So, 7/12 + 75/72 = 13/8
In mixed form: 15/8

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad