Subtract 42/80 from 3/28
3/28 - 42/80 is -117/280.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 80 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 28 × 20 = 560,
3/28 = 3 × 20/28 × 20 = 60/560 - Likewise, for the 2nd fraction, since 80 × 7 = 560,
42/80 = 42 × 7/80 × 7 = 294/560 - Subtract the two like fractions:
60/560 - 294/560 = 60 - 294/560 = -234/560 - After reducing the fraction, the answer is -117/280
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