Subtract 42/27 from 12/35, Solve 12/35

Subtract 42/27 from 12/35

1^st number: 12/35, 2^nd number: 1 15/27

12/35 - 42/27 is -382/315.

Find the least common denominator or LCM of the two denominators:
LCM of 35 and 27 is 945

Next, find the equivalent fraction of both fractional numbers with denominator 945
For the 1st fraction, since 35 × 27 = 945,
12/35 = 12 × 27/35 × 27 = 324/945
Likewise, for the 2nd fraction, since 27 × 35 = 945,
42/27 = 42 × 35/27 × 35 = 1470/945
Subtract the two like fractions:
324/945 - 1470/945 = 324 - 1470/945 = -1146/945
After reducing the fraction, the answer is -382/315

MathStep (Works offline)

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