Subtract 8/42 from 9/84
9/84 - 8/42 is -1/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 42 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 84 × 1 = 84,
9/84 = 9 × 1/84 × 1 = 9/84 - Likewise, for the 2nd fraction, since 42 × 2 = 84,
8/42 = 8 × 2/42 × 2 = 16/84 - Subtract the two like fractions:
9/84 - 16/84 = 9 - 16/84 = -7/84 - After reducing the fraction, the answer is -1/12
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