Subtract 42/80 from 5/7, Solve 5/7

Subtract 42/80 from 5/7

5/7 - 42/80 is 53/280.

Find the least common denominator or LCM of the two denominators:
LCM of 7 and 80 is 560

Next, find the equivalent fraction of both fractional numbers with denominator 560
For the 1st fraction, since 7 × 80 = 560,
5/7 = 5 × 80/7 × 80 = 400/560
Likewise, for the 2nd fraction, since 80 × 7 = 560,
42/80 = 42 × 7/80 × 7 = 294/560
Subtract the two like fractions:
400/560 - 294/560 = 400 - 294/560 = 106/560
After reducing the fraction, the answer is 53/280

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