Subtract 63/49 from 42/27, Solve 1 15/27

Subtract 63/49 from 42/27

1^st number: 1 15/27, 2^nd number: 1 14/49

42/27 - 63/49 is 17/63.

Find the least common denominator or LCM of the two denominators:
LCM of 27 and 49 is 1323

Next, find the equivalent fraction of both fractional numbers with denominator 1323
For the 1st fraction, since 27 × 49 = 1323,
42/27 = 42 × 49/27 × 49 = 2058/1323
Likewise, for the 2nd fraction, since 49 × 27 = 1323,
63/49 = 63 × 27/49 × 27 = 1701/1323
Subtract the two like fractions:
2058/1323 - 1701/1323 = 2058 - 1701/1323 = 357/1323
After reducing the fraction, the answer is 17/63

MathStep (Works offline)

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