Subtract 90/72 from 15/10, Solve 1 5/10

Subtract 90/72 from 15/10

1^st number: 1 5/10, 2^nd number: 1 18/72

15/10 - 90/72 is 1/4.

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,
15/10 = 15 × 36/10 × 36 = 540/360
Likewise, for the 2nd fraction, since 72 × 5 = 360,
90/72 = 90 × 5/72 × 5 = 450/360
Subtract the two like fractions:
540/360 - 450/360 = 540 - 450/360 = 90/360
After reducing the fraction, the answer is 1/4

MathStep (Works offline)

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