Subtract 56/48 from 21/25, Solve 21/25

Subtract 56/48 from 21/25

1^st number: 21/25, 2^nd number: 1 8/48

21/25 - 56/48 is -49/150.

Find the least common denominator or LCM of the two denominators:
LCM of 25 and 48 is 1200

Next, find the equivalent fraction of both fractional numbers with denominator 1200
For the 1st fraction, since 25 × 48 = 1200,
21/25 = 21 × 48/25 × 48 = 1008/1200
Likewise, for the 2nd fraction, since 48 × 25 = 1200,
56/48 = 56 × 25/48 × 25 = 1400/1200
Subtract the two like fractions:
1008/1200 - 1400/1200 = 1008 - 1400/1200 = -392/1200
After reducing the fraction, the answer is -49/150

MathStep (Works offline)

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