Subtract 75/9 from 49/28, Solve 1 21/28

Subtract 75/9 from 49/28

1^st number: 1 21/28, 2^nd number: 8 3/9

49/28 - 75/9 is -79/12.

Find the least common denominator or LCM of the two denominators:
LCM of 28 and 9 is 252

Next, find the equivalent fraction of both fractional numbers with denominator 252
For the 1st fraction, since 28 × 9 = 252,
49/28 = 49 × 9/28 × 9 = 441/252
Likewise, for the 2nd fraction, since 9 × 28 = 252,
75/9 = 75 × 28/9 × 28 = 2100/252
Subtract the two like fractions:
441/252 - 2100/252 = 441 - 2100/252 = -1659/252
After reducing the fraction, the answer is -79/12

MathStep (Works offline)

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