Subtract 84/72 from 1/15, Solve 1/15

Subtract 84/72 from 1/15

1^st number: 1/15, 2^nd number: 1 12/72

1/15 - 84/72 is -11/10.

Find the least common denominator or LCM of the two denominators:
LCM of 15 and 72 is 360

Next, find the equivalent fraction of both fractional numbers with denominator 360
For the 1st fraction, since 15 × 24 = 360,
1/15 = 1 × 24/15 × 24 = 24/360
Likewise, for the 2nd fraction, since 72 × 5 = 360,
84/72 = 84 × 5/72 × 5 = 420/360
Subtract the two like fractions:
24/360 - 420/360 = 24 - 420/360 = -396/360
After reducing the fraction, the answer is -11/10

MathStep (Works offline)

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