Subtract 7/21 from 2/54
2/54 - 7/21 is -8/27.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 21 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 54 × 7 = 378,
2/54 = 2 × 7/54 × 7 = 14/378 - Likewise, for the 2nd fraction, since 21 × 18 = 378,
7/21 = 7 × 18/21 × 18 = 126/378 - Subtract the two like fractions:
14/378 - 126/378 = 14 - 126/378 = -112/378 - After reducing the fraction, the answer is -8/27
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