Subtract 21/4 from 90/54
1st number: 1 36/54, 2nd number: 5 1/4
90/54 - 21/4 is -43/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 4 is 108
Next, find the equivalent fraction of both fractional numbers with denominator 108 - For the 1st fraction, since 54 × 2 = 108,
90/54 = 90 × 2/54 × 2 = 180/108 - Likewise, for the 2nd fraction, since 4 × 27 = 108,
21/4 = 21 × 27/4 × 27 = 567/108 - Subtract the two like fractions:
180/108 - 567/108 = 180 - 567/108 = -387/108 - After reducing the fraction, the answer is -43/12
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