Subtract 12/80 from 5/70, Solve 5/70

Subtract 12/80 from 5/70

5/70 - 12/80 is -11/140.

Find the least common denominator or LCM of the two denominators:
LCM of 70 and 80 is 560

Next, find the equivalent fraction of both fractional numbers with denominator 560
For the 1st fraction, since 70 × 8 = 560,
5/70 = 5 × 8/70 × 8 = 40/560
Likewise, for the 2nd fraction, since 80 × 7 = 560,
12/80 = 12 × 7/80 × 7 = 84/560
Subtract the two like fractions:
40/560 - 84/560 = 40 - 84/560 = -44/560
After reducing the fraction, the answer is -11/140

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