Subtract 14/80 from 63/42, Solve 1 21/42

Subtract 14/80 from 63/42

1^st number: 1 21/42, 2^nd number: 14/80

63/42 - 14/80 is 53/40.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 80 is 1680

Next, find the equivalent fraction of both fractional numbers with denominator 1680
For the 1st fraction, since 42 × 40 = 1680,
63/42 = 63 × 40/42 × 40 = 2520/1680
Likewise, for the 2nd fraction, since 80 × 21 = 1680,
14/80 = 14 × 21/80 × 21 = 294/1680
Subtract the two like fractions:
2520/1680 - 294/1680 = 2520 - 294/1680 = 2226/1680
After reducing the fraction, the answer is 53/40
In mixed form: 113/40

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