Subtract 21/24 from 9/84
9/84 - 21/24 is -43/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 24 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 84 × 2 = 168,
9/84 = 9 × 2/84 × 2 = 18/168 - Likewise, for the 2nd fraction, since 24 × 7 = 168,
21/24 = 21 × 7/24 × 7 = 147/168 - Subtract the two like fractions:
18/168 - 147/168 = 18 - 147/168 = -129/168 - After reducing the fraction, the answer is -43/56
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