Subtract 10/42 from 18/54
18/54 - 10/42 is 2/21.
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,
18/54 = 18 × 7/54 × 7 = 126/378 - Likewise, for the 2nd fraction, since 42 × 9 = 378,
10/42 = 10 × 9/42 × 9 = 90/378 - Subtract the two like fractions:
126/378 - 90/378 = 126 - 90/378 = 36/378 - After reducing the fraction, the answer is 2/21
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