Subtract 5/27 from 42/49, Solve 42/49

Subtract 5/27 from 42/49

42/49 - 5/27 is 127/189.

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

Next, find the equivalent fraction of both fractional numbers with denominator 1323
For the 1st fraction, since 49 × 27 = 1323,
42/49 = 42 × 27/49 × 27 = 1134/1323
Likewise, for the 2nd fraction, since 27 × 49 = 1323,
5/27 = 5 × 49/27 × 49 = 245/1323
Subtract the two like fractions:
1134/1323 - 245/1323 = 1134 - 245/1323 = 889/1323
After reducing the fraction, the answer is 127/189

MathStep (Works offline)

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