Subtract 1/15 from 2/81
2/81 - 1/15 is -17/405.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 15 is 405
Next, find the equivalent fraction of both fractional numbers with denominator 405 - For the 1st fraction, since 81 × 5 = 405,
2/81 = 2 × 5/81 × 5 = 10/405 - Likewise, for the 2nd fraction, since 15 × 27 = 405,
1/15 = 1 × 27/15 × 27 = 27/405 - Subtract the two like fractions:
10/405 - 27/405 = 10 - 27/405 = -17/405
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