Subtract 54/49 from 12/27, Solve 12/27

Subtract 54/49 from 12/27

1^st number: 12/27, 2^nd number: 1 5/49

12/27 - 54/49 is -290/441.

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,
12/27 = 12 × 49/27 × 49 = 588/1323
Likewise, for the 2nd fraction, since 49 × 27 = 1323,
54/49 = 54 × 27/49 × 27 = 1458/1323
Subtract the two like fractions:
588/1323 - 1458/1323 = 588 - 1458/1323 = -870/1323
After reducing the fraction, the answer is -290/441

MathStep (Works offline)

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