Subtract 36/81 from 18/45
18/45 - 36/81 is -2/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 81 is 405
Next, find the equivalent fraction of both fractional numbers with denominator 405 - For the 1st fraction, since 45 × 9 = 405,
18/45 = 18 × 9/45 × 9 = 162/405 - Likewise, for the 2nd fraction, since 81 × 5 = 405,
36/81 = 36 × 5/81 × 5 = 180/405 - Subtract the two like fractions:
162/405 - 180/405 = 162 - 180/405 = -18/405 - After reducing the fraction, the answer is -2/45
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