Subtract 21/36 from 10/15, Solve 10/15

Subtract 21/36 from 10/15

10/15 - 21/36 is 1/12.

Find the least common denominator or LCM of the two denominators:
LCM of 15 and 36 is 180

Next, find the equivalent fraction of both fractional numbers with denominator 180
For the 1st fraction, since 15 × 12 = 180,
10/15 = 10 × 12/15 × 12 = 120/180
Likewise, for the 2nd fraction, since 36 × 5 = 180,
21/36 = 21 × 5/36 × 5 = 105/180
Subtract the two like fractions:
120/180 - 105/180 = 120 - 105/180 = 15/180
After reducing the fraction, the answer is 1/12

MathStep (Works offline)

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