Subtract 18/81 from 3/18
3/18 - 18/81 is -1/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 81 is 162
Next, find the equivalent fraction of both fractional numbers with denominator 162 - For the 1st fraction, since 18 × 9 = 162,
3/18 = 3 × 9/18 × 9 = 27/162 - Likewise, for the 2nd fraction, since 81 × 2 = 162,
18/81 = 18 × 2/81 × 2 = 36/162 - Subtract the two like fractions:
27/162 - 36/162 = 27 - 36/162 = -9/162 - After reducing the fraction, the answer is -1/18
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