Subtract 12/54 from 72/56, Solve 1 16/56

Subtract 12/54 from 72/56

1^st number: 1 16/56, 2^nd number: 12/54

72/56 - 12/54 is 67/63.

Find the least common denominator or LCM of the two denominators:
LCM of 56 and 54 is 1512

Next, find the equivalent fraction of both fractional numbers with denominator 1512
For the 1st fraction, since 56 × 27 = 1512,
72/56 = 72 × 27/56 × 27 = 1944/1512
Likewise, for the 2nd fraction, since 54 × 28 = 1512,
12/54 = 12 × 28/54 × 28 = 336/1512
Subtract the two like fractions:
1944/1512 - 336/1512 = 1944 - 336/1512 = 1608/1512
After reducing the fraction, the answer is 67/63
In mixed form: 14/63

MathStep (Works offline)

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