Subtract 24/54 from 18/21
18/21 - 24/54 is 26/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 54 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 21 × 18 = 378,
18/21 = 18 × 18/21 × 18 = 324/378 - Likewise, for the 2nd fraction, since 54 × 7 = 378,
24/54 = 24 × 7/54 × 7 = 168/378 - Subtract the two like fractions:
324/378 - 168/378 = 324 - 168/378 = 156/378 - After reducing the fraction, the answer is 26/63
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