Subtract 21/36 from 42/54
42/54 - 21/36 is 7/36.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 36 is 108
Next, find the equivalent fraction of both fractional numbers with denominator 108 - For the 1st fraction, since 54 × 2 = 108,
42/54 = 42 × 2/54 × 2 = 84/108 - Likewise, for the 2nd fraction, since 36 × 3 = 108,
21/36 = 21 × 3/36 × 3 = 63/108 - Subtract the two like fractions:
84/108 - 63/108 = 84 - 63/108 = 21/108 - After reducing the fraction, the answer is 7/36
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