Subtract 28/18 from 15/49, Solve 15/49

Subtract 28/18 from 15/49

1^st number: 15/49, 2^nd number: 1 10/18

15/49 - 28/18 is -551/441.

Find the least common denominator or LCM of the two denominators:
LCM of 49 and 18 is 882

Next, find the equivalent fraction of both fractional numbers with denominator 882
For the 1st fraction, since 49 × 18 = 882,
15/49 = 15 × 18/49 × 18 = 270/882
Likewise, for the 2nd fraction, since 18 × 49 = 882,
28/18 = 28 × 49/18 × 49 = 1372/882
Subtract the two like fractions:
270/882 - 1372/882 = 270 - 1372/882 = -1102/882
After reducing the fraction, the answer is -551/441

MathStep (Works offline)

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