Add 70/12 and 21/49, Solve 5 10/12 + 21/49 as a fraction

Add 70/12 and 21/49

1^st number: 5 10/12, 2^nd number: 21/49

70/12 + 21/49 is 263/42.

Find the least common denominator or LCM of the two denominators:
LCM of 12 and 49 is 588

Next, find the equivalent fraction of both fractional numbers with denominator 588
For the 1st fraction, since 12 × 49 = 588,
70/12 = 70 × 49/12 × 49 = 3430/588
Likewise, for the 2nd fraction, since 49 × 12 = 588,
21/49 = 21 × 12/49 × 12 = 252/588
Add the two like fractions:
3430/588 + 252/588 = 3430 + 252/588 = 3682/588
3682/588 simplified gives 263/42
So, 70/12 + 21/49 = 263/42
In mixed form: 611/42

MathStep (Works offline)

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