Subtract 3/96 from 21/28, Solve 21/28

Subtract 3/96 from 21/28

21/28 - 3/96 is 23/32.

Find the least common denominator or LCM of the two denominators:
LCM of 28 and 96 is 672

Next, find the equivalent fraction of both fractional numbers with denominator 672
For the 1st fraction, since 28 × 24 = 672,
21/28 = 21 × 24/28 × 24 = 504/672
Likewise, for the 2nd fraction, since 96 × 7 = 672,
3/96 = 3 × 7/96 × 7 = 21/672
Subtract the two like fractions:
504/672 - 21/672 = 504 - 21/672 = 483/672
After reducing the fraction, the answer is 23/32

MathStep (Works offline)

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