Subtract 15/56 from 18/27, Solve 18/27

Subtract 15/56 from 18/27

18/27 - 15/56 is 67/168.

Find the least common denominator or LCM of the two denominators:
LCM of 27 and 56 is 1512

Next, find the equivalent fraction of both fractional numbers with denominator 1512
For the 1st fraction, since 27 × 56 = 1512,
18/27 = 18 × 56/27 × 56 = 1008/1512
Likewise, for the 2nd fraction, since 56 × 27 = 1512,
15/56 = 15 × 27/56 × 27 = 405/1512
Subtract the two like fractions:
1008/1512 - 405/1512 = 1008 - 405/1512 = 603/1512
After reducing the fraction, the answer is 67/168

MathStep (Works offline)

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