Subtract 21/16 from 28/7, Solve 4 0/7

Subtract 21/16 from 28/7

1^st number: 4 0/7, 2^nd number: 1 5/16

28/7 - 21/16 is 43/16.

Find the least common denominator or LCM of the two denominators:
LCM of 7 and 16 is 112

Next, find the equivalent fraction of both fractional numbers with denominator 112
For the 1st fraction, since 7 × 16 = 112,
28/7 = 28 × 16/7 × 16 = 448/112
Likewise, for the 2nd fraction, since 16 × 7 = 112,
21/16 = 21 × 7/16 × 7 = 147/112
Subtract the two like fractions:
448/112 - 147/112 = 448 - 147/112 = 301/112
After reducing the fraction, the answer is 43/16
In mixed form: 211/16

MathStep (Works offline)

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