Subtract 10/72 from 14/21, Solve 14/21

Subtract 10/72 from 14/21

14/21 - 10/72 is 19/36.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 72 is 504

Next, find the equivalent fraction of both fractional numbers with denominator 504
For the 1st fraction, since 21 × 24 = 504,
14/21 = 14 × 24/21 × 24 = 336/504
Likewise, for the 2nd fraction, since 72 × 7 = 504,
10/72 = 10 × 7/72 × 7 = 70/504
Subtract the two like fractions:
336/504 - 70/504 = 336 - 70/504 = 266/504
After reducing the fraction, the answer is 19/36

MathStep (Works offline)

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