Subtract 5/40 from 56/21, Solve 2 14/21

Subtract 5/40 from 56/21

1^st number: 2 14/21, 2^nd number: 5/40

56/21 - 5/40 is 61/24.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 40 is 840

Next, find the equivalent fraction of both fractional numbers with denominator 840
For the 1st fraction, since 21 × 40 = 840,
56/21 = 56 × 40/21 × 40 = 2240/840
Likewise, for the 2nd fraction, since 40 × 21 = 840,
5/40 = 5 × 21/40 × 21 = 105/840
Subtract the two like fractions:
2240/840 - 105/840 = 2240 - 105/840 = 2135/840
After reducing the fraction, the answer is 61/24
In mixed form: 213/24

MathStep (Works offline)

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