Add 90/70 and 70/35, Solve 1 20/70 + 2 0/35 as a fraction

Add 90/70 and 70/35

1^st number: 1 20/70, 2^nd number: 2 0/35

90/70 + 70/35 is 23/7.

Find the least common denominator or LCM of the two denominators:
LCM of 70 and 35 is 70

Next, find the equivalent fraction of both fractional numbers with denominator 70
For the 1st fraction, since 70 × 1 = 70,
90/70 = 90 × 1/70 × 1 = 90/70
Likewise, for the 2nd fraction, since 35 × 2 = 70,
70/35 = 70 × 2/35 × 2 = 140/70
Add the two like fractions:
90/70 + 140/70 = 90 + 140/70 = 230/70
230/70 simplified gives 23/7
So, 90/70 + 70/35 = 23/7
In mixed form: 32/7

MathStep (Works offline)

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