Subtract 9/84 from 5/15, Solve 5/15

Subtract 9/84 from 5/15

5/15 - 9/84 is 19/84.

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,
5/15 = 5 × 28/15 × 28 = 140/420
Likewise, for the 2nd fraction, since 84 × 5 = 420,
9/84 = 9 × 5/84 × 5 = 45/420
Subtract the two like fractions:
140/420 - 45/420 = 140 - 45/420 = 95/420
After reducing the fraction, the answer is 19/84

MathStep (Works offline)

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