Subtract 21/56 from 50/54, Solve 50/54

Subtract 21/56 from 50/54

50/54 - 21/56 is 119/216.

Find the least common denominator or LCM of the two denominators:
LCM of 54 and 56 is 1512

Next, find the equivalent fraction of both fractional numbers with denominator 1512
For the 1st fraction, since 54 × 28 = 1512,
50/54 = 50 × 28/54 × 28 = 1400/1512
Likewise, for the 2nd fraction, since 56 × 27 = 1512,
21/56 = 21 × 27/56 × 27 = 567/1512
Subtract the two like fractions:
1400/1512 - 567/1512 = 1400 - 567/1512 = 833/1512
After reducing the fraction, the answer is 119/216

MathStep (Works offline)

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