Subtract 75/72 from 4/10, Solve 4/10

Subtract 75/72 from 4/10

1^st number: 4/10, 2^nd number: 1 3/72

4/10 - 75/72 is -77/120.

Find the least common denominator or LCM of the two denominators:
LCM of 10 and 72 is 360

Next, find the equivalent fraction of both fractional numbers with denominator 360
For the 1st fraction, since 10 × 36 = 360,
4/10 = 4 × 36/10 × 36 = 144/360
Likewise, for the 2nd fraction, since 72 × 5 = 360,
75/72 = 75 × 5/72 × 5 = 375/360
Subtract the two like fractions:
144/360 - 375/360 = 144 - 375/360 = -231/360
After reducing the fraction, the answer is -77/120

MathStep (Works offline)

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