Add 70/49 and 7/8, Solve 1 21/49 + 7/8 as a fraction

Add 70/49 and 7/8

1^st number: 1 21/49, 2^nd number: 7/8

70/49 + 7/8 is 129/56.

Find the least common denominator or LCM of the two denominators:
LCM of 49 and 8 is 392

Next, find the equivalent fraction of both fractional numbers with denominator 392
For the 1st fraction, since 49 × 8 = 392,
70/49 = 70 × 8/49 × 8 = 560/392
Likewise, for the 2nd fraction, since 8 × 49 = 392,
7/8 = 7 × 49/8 × 49 = 343/392
Add the two like fractions:
560/392 + 343/392 = 560 + 343/392 = 903/392
903/392 simplified gives 129/56
So, 70/49 + 7/8 = 129/56
In mixed form: 217/56

MathStep (Works offline)

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