Subtract 9/49 from 9/72, Solve 9/72

Subtract 9/49 from 9/72

9/72 - 9/49 is -23/392.

Find the least common denominator or LCM of the two denominators:
LCM of 72 and 49 is 3528

Next, find the equivalent fraction of both fractional numbers with denominator 3528
For the 1st fraction, since 72 × 49 = 3528,
9/72 = 9 × 49/72 × 49 = 441/3528
Likewise, for the 2nd fraction, since 49 × 72 = 3528,
9/49 = 9 × 72/49 × 72 = 648/3528
Subtract the two like fractions:
441/3528 - 648/3528 = 441 - 648/3528 = -207/3528
After reducing the fraction, the answer is -23/392

MathStep (Works offline)

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