Subtract 7/45 from 1/81
1/81 - 7/45 is -58/405.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 45 is 405
Next, find the equivalent fraction of both fractional numbers with denominator 405 - For the 1st fraction, since 81 × 5 = 405,
1/81 = 1 × 5/81 × 5 = 5/405 - Likewise, for the 2nd fraction, since 45 × 9 = 405,
7/45 = 7 × 9/45 × 9 = 63/405 - Subtract the two like fractions:
5/405 - 63/405 = 5 - 63/405 = -58/405
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