Subtract 12/80 from 8/70
8/70 - 12/80 is -1/28.
Steps for subtracting fractions
- 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,
8/70 = 8 × 8/70 × 8 = 64/560 - Likewise, for the 2nd fraction, since 80 × 7 = 560,
12/80 = 12 × 7/80 × 7 = 84/560 - Subtract the two like fractions:
64/560 - 84/560 = 64 - 84/560 = -20/560 - After reducing the fraction, the answer is -1/28
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