Subtract 42/70 from 14/80
14/80 - 42/70 is -17/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 70 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 80 × 7 = 560,
14/80 = 14 × 7/80 × 7 = 98/560 - Likewise, for the 2nd fraction, since 70 × 8 = 560,
42/70 = 42 × 8/70 × 8 = 336/560 - Subtract the two like fractions:
98/560 - 336/560 = 98 - 336/560 = -238/560 - After reducing the fraction, the answer is -17/40
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