Subtract 56/45 from 70/49, Solve 1 21/49

Subtract 56/45 from 70/49

1^st number: 1 21/49, 2^nd number: 1 11/45

70/49 - 56/45 is 58/315.

Find the least common denominator or LCM of the two denominators:
LCM of 49 and 45 is 2205

Next, find the equivalent fraction of both fractional numbers with denominator 2205
For the 1st fraction, since 49 × 45 = 2205,
70/49 = 70 × 45/49 × 45 = 3150/2205
Likewise, for the 2nd fraction, since 45 × 49 = 2205,
56/45 = 56 × 49/45 × 49 = 2744/2205
Subtract the two like fractions:
3150/2205 - 2744/2205 = 3150 - 2744/2205 = 406/2205
After reducing the fraction, the answer is 58/315

MathStep (Works offline)

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