Subtract 9/81 from 5/42
5/42 - 9/81 is 1/126.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 81 is 1134
Next, find the equivalent fraction of both fractional numbers with denominator 1134 - For the 1st fraction, since 42 × 27 = 1134,
5/42 = 5 × 27/42 × 27 = 135/1134 - Likewise, for the 2nd fraction, since 81 × 14 = 1134,
9/81 = 9 × 14/81 × 14 = 126/1134 - Subtract the two like fractions:
135/1134 - 126/1134 = 135 - 126/1134 = 9/1134 - After reducing the fraction, the answer is 1/126
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