Subtract 21/80 from 63/28, Solve 2 7/28

Subtract 21/80 from 63/28

1^st number: 2 7/28, 2^nd number: 21/80

63/28 - 21/80 is 159/80.

Find the least common denominator or LCM of the two denominators:
LCM of 28 and 80 is 560

Next, find the equivalent fraction of both fractional numbers with denominator 560
For the 1st fraction, since 28 × 20 = 560,
63/28 = 63 × 20/28 × 20 = 1260/560
Likewise, for the 2nd fraction, since 80 × 7 = 560,
21/80 = 21 × 7/80 × 7 = 147/560
Subtract the two like fractions:
1260/560 - 147/560 = 1260 - 147/560 = 1113/560
After reducing the fraction, the answer is 159/80
In mixed form: 179/80

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