Subtract 1/81 from 5/45
5/45 - 1/81 is 8/81.
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,
5/45 = 5 × 9/45 × 9 = 45/405 - Likewise, for the 2nd fraction, since 81 × 5 = 405,
1/81 = 1 × 5/81 × 5 = 5/405 - Subtract the two like fractions:
45/405 - 5/405 = 45 - 5/405 = 40/405 - After reducing the fraction, the answer is 8/81
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