Subtract 72/16 from 18/98, Solve 18/98

Subtract 72/16 from 18/98

1^st number: 18/98, 2^nd number: 4 8/16

18/98 - 72/16 is -423/98.

Find the least common denominator or LCM of the two denominators:
LCM of 98 and 16 is 784

Next, find the equivalent fraction of both fractional numbers with denominator 784
For the 1st fraction, since 98 × 8 = 784,
18/98 = 18 × 8/98 × 8 = 144/784
Likewise, for the 2nd fraction, since 16 × 49 = 784,
72/16 = 72 × 49/16 × 49 = 3528/784
Subtract the two like fractions:
144/784 - 3528/784 = 144 - 3528/784 = -3384/784
After reducing the fraction, the answer is -423/98

MathStep (Works offline)

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