Subtract 70/75 from 49/70, Solve 49/70

Subtract 70/75 from 49/70

49/70 - 70/75 is -7/30.

Find the least common denominator or LCM of the two denominators:
LCM of 70 and 75 is 1050

Next, find the equivalent fraction of both fractional numbers with denominator 1050
For the 1st fraction, since 70 × 15 = 1050,
49/70 = 49 × 15/70 × 15 = 735/1050
Likewise, for the 2nd fraction, since 75 × 14 = 1050,
70/75 = 70 × 14/75 × 14 = 980/1050
Subtract the two like fractions:
735/1050 - 980/1050 = 735 - 980/1050 = -245/1050
After reducing the fraction, the answer is -7/30

MathStep (Works offline)

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