Subtract 48/54 from 12/42
12/42 - 48/54 is -38/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 54 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 42 × 9 = 378,
12/42 = 12 × 9/42 × 9 = 108/378 - Likewise, for the 2nd fraction, since 54 × 7 = 378,
48/54 = 48 × 7/54 × 7 = 336/378 - Subtract the two like fractions:
108/378 - 336/378 = 108 - 336/378 = -228/378 - After reducing the fraction, the answer is -38/63
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