Subtract 2/42 from 12/54
12/54 - 2/42 is 11/63.
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,
12/54 = 12 × 7/54 × 7 = 84/378 - Likewise, for the 2nd fraction, since 42 × 9 = 378,
2/42 = 2 × 9/42 × 9 = 18/378 - Subtract the two like fractions:
84/378 - 18/378 = 84 - 18/378 = 66/378 - After reducing the fraction, the answer is 11/63
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