Subtract 20/30 from 72/35, Solve 2 2/35

Subtract 20/30 from 72/35

1^st number: 2 2/35, 2^nd number: 20/30

72/35 - 20/30 is 146/105.

Find the least common denominator or LCM of the two denominators:
LCM of 35 and 30 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 35 × 6 = 210,
72/35 = 72 × 6/35 × 6 = 432/210
Likewise, for the 2nd fraction, since 30 × 7 = 210,
20/30 = 20 × 7/30 × 7 = 140/210
Subtract the two like fractions:
432/210 - 140/210 = 432 - 140/210 = 292/210
After reducing the fraction, the answer is 146/105
In mixed form: 141/105

MathStep (Works offline)

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