Subtract 70/12 from 8/63, Solve 8/63

Subtract 70/12 from 8/63

1^st number: 8/63, 2^nd number: 5 10/12

8/63 - 70/12 is -719/126.

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,
8/63 = 8 × 4/63 × 4 = 32/252
Likewise, for the 2nd fraction, since 12 × 21 = 252,
70/12 = 70 × 21/12 × 21 = 1470/252
Subtract the two like fractions:
32/252 - 1470/252 = 32 - 1470/252 = -1438/252
After reducing the fraction, the answer is -719/126

MathStep (Works offline)

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