Add 8/80 and 70/49, Solve 8/80 + 1 21/49 as a fraction

Add 8/80 and 70/49

1^st number: 8/80, 2^nd number: 1 21/49

8/80 + 70/49 is 107/70.

Find the least common denominator or LCM of the two denominators:
LCM of 80 and 49 is 3920

Next, find the equivalent fraction of both fractional numbers with denominator 3920
For the 1st fraction, since 80 × 49 = 3920,
8/80 = 8 × 49/80 × 49 = 392/3920
Likewise, for the 2nd fraction, since 49 × 80 = 3920,
70/49 = 70 × 80/49 × 80 = 5600/3920
Add the two like fractions:
392/3920 + 5600/3920 = 392 + 5600/3920 = 5992/3920
5992/3920 simplified gives 107/70
So, 8/80 + 70/49 = 107/70
In mixed form: 137/70

MathStep (Works offline)

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