Subtract 12/24 from 21/14, Solve 1 7/14

Subtract 12/24 from 21/14

1^st number: 1 7/14, 2^nd number: 12/24

21/14 - 12/24 is 1/1.

Find the least common denominator or LCM of the two denominators:
LCM of 14 and 24 is 168

Next, find the equivalent fraction of both fractional numbers with denominator 168
For the 1st fraction, since 14 × 12 = 168,
21/14 = 21 × 12/14 × 12 = 252/168
Likewise, for the 2nd fraction, since 24 × 7 = 168,
12/24 = 12 × 7/24 × 7 = 84/168
Subtract the two like fractions:
252/168 - 84/168 = 252 - 84/168 = 168/168
After reducing the fraction, the answer is 1/1

MathStep (Works offline)

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