Subtract 24/12 from 15/70, Solve 15/70

Subtract 24/12 from 15/70

1^st number: 15/70, 2^nd number: 2 0/12

15/70 - 24/12 is -25/14.

Find the least common denominator or LCM of the two denominators:
LCM of 70 and 12 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 70 × 6 = 420,
15/70 = 15 × 6/70 × 6 = 90/420
Likewise, for the 2nd fraction, since 12 × 35 = 420,
24/12 = 24 × 35/12 × 35 = 840/420
Subtract the two like fractions:
90/420 - 840/420 = 90 - 840/420 = -750/420
After reducing the fraction, the answer is -25/14

MathStep (Works offline)

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