Subtract 1/36 from 18/81
18/81 - 1/36 is 7/36.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 36 is 324
Next, find the equivalent fraction of both fractional numbers with denominator 324 - For the 1st fraction, since 81 × 4 = 324,
18/81 = 18 × 4/81 × 4 = 72/324 - Likewise, for the 2nd fraction, since 36 × 9 = 324,
1/36 = 1 × 9/36 × 9 = 9/324 - Subtract the two like fractions:
72/324 - 9/324 = 72 - 9/324 = 63/324 - After reducing the fraction, the answer is 7/36
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