Subtract 20/12 from 48/15, Solve 3 3/15

Subtract 20/12 from 48/15

1^st number: 3 3/15, 2^nd number: 1 8/12

48/15 - 20/12 is 23/15.

Find the least common denominator or LCM of the two denominators:
LCM of 15 and 12 is 60

Next, find the equivalent fraction of both fractional numbers with denominator 60
For the 1st fraction, since 15 × 4 = 60,
48/15 = 48 × 4/15 × 4 = 192/60
Likewise, for the 2nd fraction, since 12 × 5 = 60,
20/12 = 20 × 5/12 × 5 = 100/60
Subtract the two like fractions:
192/60 - 100/60 = 192 - 100/60 = 92/60
After reducing the fraction, the answer is 23/15
In mixed form: 18/15

MathStep (Works offline)

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