Subtract 24/21 from 72/6, Solve 12 0/6

Subtract 24/21 from 72/6

1^st number: 12 0/6, 2^nd number: 1 3/21

72/6 - 24/21 is 76/7.

Find the least common denominator or LCM of the two denominators:
LCM of 6 and 21 is 42

Next, find the equivalent fraction of both fractional numbers with denominator 42
For the 1st fraction, since 6 × 7 = 42,
72/6 = 72 × 7/6 × 7 = 504/42
Likewise, for the 2nd fraction, since 21 × 2 = 42,
24/21 = 24 × 2/21 × 2 = 48/42
Subtract the two like fractions:
504/42 - 48/42 = 504 - 48/42 = 456/42
After reducing the fraction, the answer is 76/7
In mixed form: 106/7

MathStep (Works offline)

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