Subtract 5/84 from 28/72, Solve 28/72

Subtract 5/84 from 28/72

28/72 - 5/84 is 83/252.

Find the least common denominator or LCM of the two denominators:
LCM of 72 and 84 is 504

Next, find the equivalent fraction of both fractional numbers with denominator 504
For the 1st fraction, since 72 × 7 = 504,
28/72 = 28 × 7/72 × 7 = 196/504
Likewise, for the 2nd fraction, since 84 × 6 = 504,
5/84 = 5 × 6/84 × 6 = 30/504
Subtract the two like fractions:
196/504 - 30/504 = 196 - 30/504 = 166/504
After reducing the fraction, the answer is 83/252

MathStep (Works offline)

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