Subtract 45/54 from 1/21
1/21 - 45/54 is -11/14.
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,
1/21 = 1 × 18/21 × 18 = 18/378 - Likewise, for the 2nd fraction, since 54 × 7 = 378,
45/54 = 45 × 7/54 × 7 = 315/378 - Subtract the two like fractions:
18/378 - 315/378 = 18 - 315/378 = -297/378 - After reducing the fraction, the answer is -11/14
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