Subtract 4/81 from 1/45
1/45 - 4/81 is -11/405.
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,
1/45 = 1 × 9/45 × 9 = 9/405 - Likewise, for the 2nd fraction, since 81 × 5 = 405,
4/81 = 4 × 5/81 × 5 = 20/405 - Subtract the two like fractions:
9/405 - 20/405 = 9 - 20/405 = -11/405
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