Subtract 40/81 from 6/15
6/15 - 40/81 is -38/405.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 81 is 405
Next, find the equivalent fraction of both fractional numbers with denominator 405 - For the 1st fraction, since 15 × 27 = 405,
6/15 = 6 × 27/15 × 27 = 162/405 - Likewise, for the 2nd fraction, since 81 × 5 = 405,
40/81 = 40 × 5/81 × 5 = 200/405 - Subtract the two like fractions:
162/405 - 200/405 = 162 - 200/405 = -38/405
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