Add 56/12 and 30/70, Solve 4 8/12 + 30/70 as a fraction

Add 56/12 and 30/70

1^st number: 4 8/12, 2^nd number: 30/70

56/12 + 30/70 is 107/21.

Find the least common denominator or LCM of the two denominators:
LCM of 12 and 70 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 12 × 35 = 420,
56/12 = 56 × 35/12 × 35 = 1960/420
Likewise, for the 2nd fraction, since 70 × 6 = 420,
30/70 = 30 × 6/70 × 6 = 180/420
Add the two like fractions:
1960/420 + 180/420 = 1960 + 180/420 = 2140/420
2140/420 simplified gives 107/21
So, 56/12 + 30/70 = 107/21
In mixed form: 52/21

MathStep (Works offline)

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