Subtract 30/81 from 2/15
2/15 - 30/81 is -32/135.
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,
2/15 = 2 × 27/15 × 27 = 54/405 - Likewise, for the 2nd fraction, since 81 × 5 = 405,
30/81 = 30 × 5/81 × 5 = 150/405 - Subtract the two like fractions:
54/405 - 150/405 = 54 - 150/405 = -96/405 - After reducing the fraction, the answer is -32/135
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