Subtract 35/21 from 98/72, Solve 1 26/72

Subtract 35/21 from 98/72

1^st number: 1 26/72, 2^nd number: 1 14/21

98/72 - 35/21 is -11/36.

Find the least common denominator or LCM of the two denominators:
LCM of 72 and 21 is 504

Next, find the equivalent fraction of both fractional numbers with denominator 504
For the 1st fraction, since 72 × 7 = 504,
98/72 = 98 × 7/72 × 7 = 686/504
Likewise, for the 2nd fraction, since 21 × 24 = 504,
35/21 = 35 × 24/21 × 24 = 840/504
Subtract the two like fractions:
686/504 - 840/504 = 686 - 840/504 = -154/504
After reducing the fraction, the answer is -11/36

MathStep (Works offline)

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