Subtract 60/40 from 60/84, Solve 60/84

Subtract 60/40 from 60/84

1^st number: 60/84, 2^nd number: 1 20/40

60/84 - 60/40 is -11/14.

Find the least common denominator or LCM of the two denominators:
LCM of 84 and 40 is 840

Next, find the equivalent fraction of both fractional numbers with denominator 840
For the 1st fraction, since 84 × 10 = 840,
60/84 = 60 × 10/84 × 10 = 600/840
Likewise, for the 2nd fraction, since 40 × 21 = 840,
60/40 = 60 × 21/40 × 21 = 1260/840
Subtract the two like fractions:
600/840 - 1260/840 = 600 - 1260/840 = -660/840
After reducing the fraction, the answer is -11/14

MathStep (Works offline)

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