Subtract 80/84 from 5/42
5/42 - 80/84 is -5/6.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 84 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 42 × 2 = 84,
5/42 = 5 × 2/42 × 2 = 10/84 - Likewise, for the 2nd fraction, since 84 × 1 = 84,
80/84 = 80 × 1/84 × 1 = 80/84 - Subtract the two like fractions:
10/84 - 80/84 = 10 - 80/84 = -70/84 - After reducing the fraction, the answer is -5/6
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