Subtract 49/45 from 14/21, Solve 14/21

Subtract 49/45 from 14/21

1^st number: 14/21, 2^nd number: 1 4/45

14/21 - 49/45 is -19/45.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 45 is 315

Next, find the equivalent fraction of both fractional numbers with denominator 315
For the 1st fraction, since 21 × 15 = 315,
14/21 = 14 × 15/21 × 15 = 210/315
Likewise, for the 2nd fraction, since 45 × 7 = 315,
49/45 = 49 × 7/45 × 7 = 343/315
Subtract the two like fractions:
210/315 - 343/315 = 210 - 343/315 = -133/315
After reducing the fraction, the answer is -19/45

MathStep (Works offline)

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