Subtract 12/9 from 5/70, Solve 5/70

Subtract 12/9 from 5/70

1^st number: 5/70, 2^nd number: 1 3/9

5/70 - 12/9 is -53/42.

Find the least common denominator or LCM of the two denominators:
LCM of 70 and 9 is 630

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 70 × 9 = 630,
5/70 = 5 × 9/70 × 9 = 45/630
Likewise, for the 2nd fraction, since 9 × 70 = 630,
12/9 = 12 × 70/9 × 70 = 840/630
Subtract the two like fractions:
45/630 - 840/630 = 45 - 840/630 = -795/630
After reducing the fraction, the answer is -53/42

MathStep (Works offline)

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