Subtract 3/80 from 63/21, Solve 3 0/21

Subtract 3/80 from 63/21

1^st number: 3 0/21, 2^nd number: 3/80

63/21 - 3/80 is 237/80.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 80 is 1680

Next, find the equivalent fraction of both fractional numbers with denominator 1680
For the 1st fraction, since 21 × 80 = 1680,
63/21 = 63 × 80/21 × 80 = 5040/1680
Likewise, for the 2nd fraction, since 80 × 21 = 1680,
3/80 = 3 × 21/80 × 21 = 63/1680
Subtract the two like fractions:
5040/1680 - 63/1680 = 5040 - 63/1680 = 4977/1680
After reducing the fraction, the answer is 237/80
In mixed form: 277/80

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