Subtract 9/15 from 27/63, Solve 27/63

Subtract 9/15 from 27/63

27/63 - 9/15 is -6/35.

Find the least common denominator or LCM of the two denominators:
LCM of 63 and 15 is 315

Next, find the equivalent fraction of both fractional numbers with denominator 315
For the 1st fraction, since 63 × 5 = 315,
27/63 = 27 × 5/63 × 5 = 135/315
Likewise, for the 2nd fraction, since 15 × 21 = 315,
9/15 = 9 × 21/15 × 21 = 189/315
Subtract the two like fractions:
135/315 - 189/315 = 135 - 189/315 = -54/315
After reducing the fraction, the answer is -6/35

MathStep (Works offline)

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