Subtract 9/36 from 21/25, Solve 21/25

Subtract 9/36 from 21/25

21/25 - 9/36 is 59/100.

Find the least common denominator or LCM of the two denominators:
LCM of 25 and 36 is 900

Next, find the equivalent fraction of both fractional numbers with denominator 900
For the 1st fraction, since 25 × 36 = 900,
21/25 = 21 × 36/25 × 36 = 756/900
Likewise, for the 2nd fraction, since 36 × 25 = 900,
9/36 = 9 × 25/36 × 25 = 225/900
Subtract the two like fractions:
756/900 - 225/900 = 756 - 225/900 = 531/900
After reducing the fraction, the answer is 59/100

MathStep (Works offline)

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