Subtract 20/24 from 21/54
21/54 - 20/24 is -4/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 24 is 216
Next, find the equivalent fraction of both fractional numbers with denominator 216 - For the 1st fraction, since 54 × 4 = 216,
21/54 = 21 × 4/54 × 4 = 84/216 - Likewise, for the 2nd fraction, since 24 × 9 = 216,
20/24 = 20 × 9/24 × 9 = 180/216 - Subtract the two like fractions:
84/216 - 180/216 = 84 - 180/216 = -96/216 - After reducing the fraction, the answer is -4/9
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