Subtract 42/12 from 6/70, Solve 6/70

Subtract 42/12 from 6/70

1^st number: 6/70, 2^nd number: 3 6/12

6/70 - 42/12 is -239/70.

Find the least common denominator or LCM of the two denominators:
LCM of 70 and 12 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 70 × 6 = 420,
6/70 = 6 × 6/70 × 6 = 36/420
Likewise, for the 2nd fraction, since 12 × 35 = 420,
42/12 = 42 × 35/12 × 35 = 1470/420
Subtract the two like fractions:
36/420 - 1470/420 = 36 - 1470/420 = -1434/420
After reducing the fraction, the answer is -239/70

MathStep (Works offline)

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