Subtract 15/30 from 49/28, Solve 1 21/28

Subtract 15/30 from 49/28

1^st number: 1 21/28, 2^nd number: 15/30

49/28 - 15/30 is 5/4.

Find the least common denominator or LCM of the two denominators:
LCM of 28 and 30 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 28 × 15 = 420,
49/28 = 49 × 15/28 × 15 = 735/420
Likewise, for the 2nd fraction, since 30 × 14 = 420,
15/30 = 15 × 14/30 × 14 = 210/420
Subtract the two like fractions:
735/420 - 210/420 = 735 - 210/420 = 525/420
After reducing the fraction, the answer is 5/4
In mixed form: 11/4

MathStep (Works offline)

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