Add 12/30 and 42/7, Solve 12/30 + 6 0/7 as a fraction

Add 12/30 and 42/7

1^st number: 12/30, 2^nd number: 6 0/7

12/30 + 42/7 is 32/5.

Find the least common denominator or LCM of the two denominators:
LCM of 30 and 7 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 30 × 7 = 210,
12/30 = 12 × 7/30 × 7 = 84/210
Likewise, for the 2nd fraction, since 7 × 30 = 210,
42/7 = 42 × 30/7 × 30 = 1260/210
Add the two like fractions:
84/210 + 1260/210 = 84 + 1260/210 = 1344/210
1344/210 simplified gives 32/5
So, 12/30 + 42/7 = 32/5
In mixed form: 62/5

MathStep (Works offline)

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