Subtract 30/20 from 8/35, Solve 8/35

Subtract 30/20 from 8/35

1^st number: 8/35, 2^nd number: 1 10/20

8/35 - 30/20 is -89/70.

Find the least common denominator or LCM of the two denominators:
LCM of 35 and 20 is 140

Next, find the equivalent fraction of both fractional numbers with denominator 140
For the 1st fraction, since 35 × 4 = 140,
8/35 = 8 × 4/35 × 4 = 32/140
Likewise, for the 2nd fraction, since 20 × 7 = 140,
30/20 = 30 × 7/20 × 7 = 210/140
Subtract the two like fractions:
32/140 - 210/140 = 32 - 210/140 = -178/140
After reducing the fraction, the answer is -89/70

MathStep (Works offline)

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