Add 7/5 and 8/12, Solve 1 2/5 + 8/12 as a fraction

Add 7/5 and 8/12

1^st number: 1 2/5, 2^nd number: 8/12

7/5 + 8/12 is 31/15.

Find the least common denominator or LCM of the two denominators:
LCM of 5 and 12 is 60

Next, find the equivalent fraction of both fractional numbers with denominator 60
For the 1st fraction, since 5 × 12 = 60,
7/5 = 7 × 12/5 × 12 = 84/60
Likewise, for the 2nd fraction, since 12 × 5 = 60,
8/12 = 8 × 5/12 × 5 = 40/60
Add the two like fractions:
84/60 + 40/60 = 84 + 40/60 = 124/60
124/60 simplified gives 31/15
So, 7/5 + 8/12 = 31/15
In mixed form: 21/15

MathStep (Works offline)

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