Subtract 72/80 from 3/70
3/70 - 72/80 is -6/7.
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,
3/70 = 3 × 8/70 × 8 = 24/560 - Likewise, for the 2nd fraction, since 80 × 7 = 560,
72/80 = 72 × 7/80 × 7 = 504/560 - Subtract the two like fractions:
24/560 - 504/560 = 24 - 504/560 = -480/560 - After reducing the fraction, the answer is -6/7
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