Subtract 15/7 from 63/12, Solve 5 3/12

Subtract 15/7 from 63/12

1^st number: 5 3/12, 2^nd number: 2 1/7

63/12 - 15/7 is 87/28.

Find the least common denominator or LCM of the two denominators:
LCM of 12 and 7 is 84

Next, find the equivalent fraction of both fractional numbers with denominator 84
For the 1st fraction, since 12 × 7 = 84,
63/12 = 63 × 7/12 × 7 = 441/84
Likewise, for the 2nd fraction, since 7 × 12 = 84,
15/7 = 15 × 12/7 × 12 = 180/84
Subtract the two like fractions:
441/84 - 180/84 = 441 - 180/84 = 261/84
After reducing the fraction, the answer is 87/28
In mixed form: 33/28

MathStep (Works offline)

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