Subtract 4/20 from 56/21, Solve 2 14/21

Subtract 4/20 from 56/21

1^st number: 2 14/21, 2^nd number: 4/20

56/21 - 4/20 is 37/15.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 20 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 21 × 20 = 420,
56/21 = 56 × 20/21 × 20 = 1120/420
Likewise, for the 2nd fraction, since 20 × 21 = 420,
4/20 = 4 × 21/20 × 21 = 84/420
Subtract the two like fractions:
1120/420 - 84/420 = 1120 - 84/420 = 1036/420
After reducing the fraction, the answer is 37/15
In mixed form: 27/15

MathStep (Works offline)

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