Subtract 56/21 from 40/3, Solve 13 1/3

Subtract 56/21 from 40/3

1^st number: 13 1/3, 2^nd number: 2 14/21

40/3 - 56/21 is 32/3.

Find the least common denominator or LCM of the two denominators:
LCM of 3 and 21 is 21

Next, find the equivalent fraction of both fractional numbers with denominator 21
For the 1st fraction, since 3 × 7 = 21,
40/3 = 40 × 7/3 × 7 = 280/21
Likewise, for the 2nd fraction, since 21 × 1 = 21,
56/21 = 56 × 1/21 × 1 = 56/21
Subtract the two like fractions:
280/21 - 56/21 = 280 - 56/21 = 224/21
After reducing the fraction, the answer is 32/3
In mixed form: 102/3

MathStep (Works offline)

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