Subtract 21/35 from 98/45, Solve 2 8/45

Subtract 21/35 from 98/45

1^st number: 2 8/45, 2^nd number: 21/35

98/45 - 21/35 is 71/45.

Find the least common denominator or LCM of the two denominators:
LCM of 45 and 35 is 315

Next, find the equivalent fraction of both fractional numbers with denominator 315
For the 1st fraction, since 45 × 7 = 315,
98/45 = 98 × 7/45 × 7 = 686/315
Likewise, for the 2nd fraction, since 35 × 9 = 315,
21/35 = 21 × 9/35 × 9 = 189/315
Subtract the two like fractions:
686/315 - 189/315 = 686 - 189/315 = 497/315
After reducing the fraction, the answer is 71/45
In mixed form: 126/45

MathStep (Works offline)

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