Add 3/12 and 10/7, Solve 3/12 + 1 3/7 as a fraction

Add 3/12 and 10/7

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

3/12 + 10/7 is 47/28.

Find the least common denominator or LCM of the two denominators:
LCM of 12 and 7 is 84

Next, find the equivalent fraction of both fractional numbers with denominator 84
For the 1st fraction, since 12 × 7 = 84,
3/12 = 3 × 7/12 × 7 = 21/84
Likewise, for the 2nd fraction, since 7 × 12 = 84,
10/7 = 10 × 12/7 × 12 = 120/84
Add the two like fractions:
21/84 + 120/84 = 21 + 120/84 = 141/84
141/84 simplified gives 47/28
So, 3/12 + 10/7 = 47/28
In mixed form: 119/28

MathStep (Works offline)

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