Subtract 15/12 from 12/63, Solve 12/63

Subtract 15/12 from 12/63

1^st number: 12/63, 2^nd number: 1 3/12

12/63 - 15/12 is -89/84.

Find the least common denominator or LCM of the two denominators:
LCM of 63 and 12 is 252

Next, find the equivalent fraction of both fractional numbers with denominator 252
For the 1st fraction, since 63 × 4 = 252,
12/63 = 12 × 4/63 × 4 = 48/252
Likewise, for the 2nd fraction, since 12 × 21 = 252,
15/12 = 15 × 21/12 × 21 = 315/252
Subtract the two like fractions:
48/252 - 315/252 = 48 - 315/252 = -267/252
After reducing the fraction, the answer is -89/84

MathStep (Works offline)

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