Subtract 8/21 from 36/30, Solve 1 6/30

Subtract 8/21 from 36/30

1^st number: 1 6/30, 2^nd number: 8/21

36/30 - 8/21 is 86/105.

Find the least common denominator or LCM of the two denominators:
LCM of 30 and 21 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 30 × 7 = 210,
36/30 = 36 × 7/30 × 7 = 252/210
Likewise, for the 2nd fraction, since 21 × 10 = 210,
8/21 = 8 × 10/21 × 10 = 80/210
Subtract the two like fractions:
252/210 - 80/210 = 252 - 80/210 = 172/210
After reducing the fraction, the answer is 86/105

MathStep (Works offline)

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