Subtract 27/21 from 18/24
1st number: 18/24, 2nd number: 1 6/21
18/24 - 27/21 is -15/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 21 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 24 × 7 = 168,
18/24 = 18 × 7/24 × 7 = 126/168 - Likewise, for the 2nd fraction, since 21 × 8 = 168,
27/21 = 27 × 8/21 × 8 = 216/168 - Subtract the two like fractions:
126/168 - 216/168 = 126 - 216/168 = -90/168 - After reducing the fraction, the answer is -15/28
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