Subtract 21/27 from 5/63, Solve 5/63

Subtract 21/27 from 5/63

5/63 - 21/27 is -44/63.

Find the least common denominator or LCM of the two denominators:
LCM of 63 and 27 is 189

Next, find the equivalent fraction of both fractional numbers with denominator 189
For the 1st fraction, since 63 × 3 = 189,
5/63 = 5 × 3/63 × 3 = 15/189
Likewise, for the 2nd fraction, since 27 × 7 = 189,
21/27 = 21 × 7/27 × 7 = 147/189
Subtract the two like fractions:
15/189 - 147/189 = 15 - 147/189 = -132/189
After reducing the fraction, the answer is -44/63

MathStep (Works offline)

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