Subtract 42/28 from 5/80, Solve 5/80

Subtract 42/28 from 5/80

1^st number: 5/80, 2^nd number: 1 14/28

5/80 - 42/28 is -23/16.

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

Next, find the equivalent fraction of both fractional numbers with denominator 560
For the 1st fraction, since 80 × 7 = 560,
5/80 = 5 × 7/80 × 7 = 35/560
Likewise, for the 2nd fraction, since 28 × 20 = 560,
42/28 = 42 × 20/28 × 20 = 840/560
Subtract the two like fractions:
35/560 - 840/560 = 35 - 840/560 = -805/560
After reducing the fraction, the answer is -23/16

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