Subtract 96/36 from 21/28, Solve 21/28

Subtract 96/36 from 21/28

1^st number: 21/28, 2^nd number: 2 24/36

21/28 - 96/36 is -23/12.

Find the least common denominator or LCM of the two denominators:
LCM of 28 and 36 is 252

Next, find the equivalent fraction of both fractional numbers with denominator 252
For the 1st fraction, since 28 × 9 = 252,
21/28 = 21 × 9/28 × 9 = 189/252
Likewise, for the 2nd fraction, since 36 × 7 = 252,
96/36 = 96 × 7/36 × 7 = 672/252
Subtract the two like fractions:
189/252 - 672/252 = 189 - 672/252 = -483/252
After reducing the fraction, the answer is -23/12

MathStep (Works offline)

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