Subtract 20/15 from 14/63, Solve 14/63

Subtract 20/15 from 14/63

1^st number: 14/63, 2^nd number: 1 5/15

14/63 - 20/15 is -10/9.

Find the least common denominator or LCM of the two denominators:
LCM of 63 and 15 is 315

Next, find the equivalent fraction of both fractional numbers with denominator 315
For the 1st fraction, since 63 × 5 = 315,
14/63 = 14 × 5/63 × 5 = 70/315
Likewise, for the 2nd fraction, since 15 × 21 = 315,
20/15 = 20 × 21/15 × 21 = 420/315
Subtract the two like fractions:
70/315 - 420/315 = 70 - 420/315 = -350/315
After reducing the fraction, the answer is -10/9

MathStep (Works offline)

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