Add 28/12 and 63/70, Solve 2 4/12 + 63/70 as a fraction

Add 28/12 and 63/70

1^st number: 2 4/12, 2^nd number: 63/70

28/12 + 63/70 is 97/30.

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,
28/12 = 28 × 35/12 × 35 = 980/420
Likewise, for the 2nd fraction, since 70 × 6 = 420,
63/70 = 63 × 6/70 × 6 = 378/420
Add the two like fractions:
980/420 + 378/420 = 980 + 378/420 = 1358/420
1358/420 simplified gives 97/30
So, 28/12 + 63/70 = 97/30
In mixed form: 37/30

MathStep (Works offline)

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