Add 10/70 and 9/7, Solve 10/70 + 1 2/7 as a fraction

Add 10/70 and 9/7

1^st number: 10/70, 2^nd number: 1 2/7

10/70 + 9/7 is 10/7.

Find the least common denominator or LCM of the two denominators:
LCM of 70 and 7 is 70

Next, find the equivalent fraction of both fractional numbers with denominator 70
For the 1st fraction, since 70 × 1 = 70,
10/70 = 10 × 1/70 × 1 = 10/70
Likewise, for the 2nd fraction, since 7 × 10 = 70,
9/7 = 9 × 10/7 × 10 = 90/70
Add the two like fractions:
10/70 + 90/70 = 10 + 90/70 = 100/70
100/70 simplified gives 10/7
So, 10/70 + 9/7 = 10/7
In mixed form: 13/7

MathStep (Works offline)

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