Subtract 18/21 from 24/84
24/84 - 18/21 is -4/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 84 × 1 = 84,
24/84 = 24 × 1/84 × 1 = 24/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
18/21 = 18 × 4/21 × 4 = 72/84 - Subtract the two like fractions:
24/84 - 72/84 = 24 - 72/84 = -48/84 - After reducing the fraction, the answer is -4/7
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