Subtract 15/63 from 30/49, Solve 30/49

Subtract 15/63 from 30/49

30/49 - 15/63 is 55/147.

Find the least common denominator or LCM of the two denominators:
LCM of 49 and 63 is 441

Next, find the equivalent fraction of both fractional numbers with denominator 441
For the 1st fraction, since 49 × 9 = 441,
30/49 = 30 × 9/49 × 9 = 270/441
Likewise, for the 2nd fraction, since 63 × 7 = 441,
15/63 = 15 × 7/63 × 7 = 105/441
Subtract the two like fractions:
270/441 - 105/441 = 270 - 105/441 = 165/441
After reducing the fraction, the answer is 55/147

MathStep (Works offline)

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