Subtract 12/80 from 9/70
9/70 - 12/80 is -3/140.
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,
9/70 = 9 × 8/70 × 8 = 72/560 - Likewise, for the 2nd fraction, since 80 × 7 = 560,
12/80 = 12 × 7/80 × 7 = 84/560 - Subtract the two like fractions:
72/560 - 84/560 = 72 - 84/560 = -12/560 - After reducing the fraction, the answer is -3/140
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