Subtract 90/72 from 5/14, Solve 5/14

Subtract 90/72 from 5/14

1^st number: 5/14, 2^nd number: 1 18/72

5/14 - 90/72 is -25/28.

Find the least common denominator or LCM of the two denominators:
LCM of 14 and 72 is 504

Next, find the equivalent fraction of both fractional numbers with denominator 504
For the 1st fraction, since 14 × 36 = 504,
5/14 = 5 × 36/14 × 36 = 180/504
Likewise, for the 2nd fraction, since 72 × 7 = 504,
90/72 = 90 × 7/72 × 7 = 630/504
Subtract the two like fractions:
180/504 - 630/504 = 180 - 630/504 = -450/504
After reducing the fraction, the answer is -25/28

MathStep (Works offline)

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