Subtract 18/42 from 9/54
9/54 - 18/42 is -11/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 42 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 54 × 7 = 378,
9/54 = 9 × 7/54 × 7 = 63/378 - Likewise, for the 2nd fraction, since 42 × 9 = 378,
18/42 = 18 × 9/42 × 9 = 162/378 - Subtract the two like fractions:
63/378 - 162/378 = 63 - 162/378 = -99/378 - After reducing the fraction, the answer is -11/42
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