Subtract 7/80 from 21/14, Solve 1 7/14

Subtract 7/80 from 21/14

1^st number: 1 7/14, 2^nd number: 7/80

21/14 - 7/80 is 113/80.

Find the least common denominator or LCM of the two denominators:
LCM of 14 and 80 is 560

Next, find the equivalent fraction of both fractional numbers with denominator 560
For the 1st fraction, since 14 × 40 = 560,
21/14 = 21 × 40/14 × 40 = 840/560
Likewise, for the 2nd fraction, since 80 × 7 = 560,
7/80 = 7 × 7/80 × 7 = 49/560
Subtract the two like fractions:
840/560 - 49/560 = 840 - 49/560 = 791/560
After reducing the fraction, the answer is 113/80
In mixed form: 133/80

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