Subtract 7/40 from 15/27, Solve 15/27

Subtract 7/40 from 15/27

15/27 - 7/40 is 137/360.

Find the least common denominator or LCM of the two denominators:
LCM of 27 and 40 is 1080

Next, find the equivalent fraction of both fractional numbers with denominator 1080
For the 1st fraction, since 27 × 40 = 1080,
15/27 = 15 × 40/27 × 40 = 600/1080
Likewise, for the 2nd fraction, since 40 × 27 = 1080,
7/40 = 7 × 27/40 × 27 = 189/1080
Subtract the two like fractions:
600/1080 - 189/1080 = 600 - 189/1080 = 411/1080
After reducing the fraction, the answer is 137/360

MathStep (Works offline)

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