Subtract 18/70 from 42/80
42/80 - 18/70 is 15/56.
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,
42/80 = 42 × 7/80 × 7 = 294/560 - Likewise, for the 2nd fraction, since 70 × 8 = 560,
18/70 = 18 × 8/70 × 8 = 144/560 - Subtract the two like fractions:
294/560 - 144/560 = 294 - 144/560 = 150/560 - After reducing the fraction, the answer is 15/56
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