Subtract 63/48 from 18/72, Solve 18/72

Subtract 63/48 from 18/72

1^st number: 18/72, 2^nd number: 1 15/48

18/72 - 63/48 is -17/16.

Find the least common denominator or LCM of the two denominators:
LCM of 72 and 48 is 144

Next, find the equivalent fraction of both fractional numbers with denominator 144
For the 1st fraction, since 72 × 2 = 144,
18/72 = 18 × 2/72 × 2 = 36/144
Likewise, for the 2nd fraction, since 48 × 3 = 144,
63/48 = 63 × 3/48 × 3 = 189/144
Subtract the two like fractions:
36/144 - 189/144 = 36 - 189/144 = -153/144
After reducing the fraction, the answer is -17/16

MathStep (Works offline)

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