Subtract 70/60 from 7/42, Solve 7/42

Subtract 70/60 from 7/42

1^st number: 7/42, 2^nd number: 1 10/60

7/42 - 70/60 is -1/1.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 60 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 42 × 10 = 420,
7/42 = 7 × 10/42 × 10 = 70/420
Likewise, for the 2nd fraction, since 60 × 7 = 420,
70/60 = 70 × 7/60 × 7 = 490/420
Subtract the two like fractions:
70/420 - 490/420 = 70 - 490/420 = -420/420
After reducing the fraction, the answer is -1/1

MathStep (Works offline)

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