Subtract 63/42 from 2/27, Solve 2/27

Subtract 63/42 from 2/27

1^st number: 2/27, 2^nd number: 1 21/42

2/27 - 63/42 is -77/54.

Find the least common denominator or LCM of the two denominators:
LCM of 27 and 42 is 378

Next, find the equivalent fraction of both fractional numbers with denominator 378
For the 1st fraction, since 27 × 14 = 378,
2/27 = 2 × 14/27 × 14 = 28/378
Likewise, for the 2nd fraction, since 42 × 9 = 378,
63/42 = 63 × 9/42 × 9 = 567/378
Subtract the two like fractions:
28/378 - 567/378 = 28 - 567/378 = -539/378
After reducing the fraction, the answer is -77/54

MathStep (Works offline)

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