Subtract 42/48 from 10/70, Solve 10/70

Subtract 42/48 from 10/70

10/70 - 42/48 is -41/56.

Find the least common denominator or LCM of the two denominators:
LCM of 70 and 48 is 1680

Next, find the equivalent fraction of both fractional numbers with denominator 1680
For the 1st fraction, since 70 × 24 = 1680,
10/70 = 10 × 24/70 × 24 = 240/1680
Likewise, for the 2nd fraction, since 48 × 35 = 1680,
42/48 = 42 × 35/48 × 35 = 1470/1680
Subtract the two like fractions:
240/1680 - 1470/1680 = 240 - 1470/1680 = -1230/1680
After reducing the fraction, the answer is -41/56

MathStep (Works offline)

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