Subtract 60/84 from 40/15, Solve 2 10/15

Subtract 60/84 from 40/15

1^st number: 2 10/15, 2^nd number: 60/84

40/15 - 60/84 is 41/21.

Find the least common denominator or LCM of the two denominators:
LCM of 15 and 84 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 15 × 28 = 420,
40/15 = 40 × 28/15 × 28 = 1120/420
Likewise, for the 2nd fraction, since 84 × 5 = 420,
60/84 = 60 × 5/84 × 5 = 300/420
Subtract the two like fractions:
1120/420 - 300/420 = 1120 - 300/420 = 820/420
After reducing the fraction, the answer is 41/21
In mixed form: 120/21

MathStep (Works offline)

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