Subtract 7/81 from 4/40
4/40 - 7/81 is 11/810.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 81 is 3240
Next, find the equivalent fraction of both fractional numbers with denominator 3240 - For the 1st fraction, since 40 × 81 = 3240,
4/40 = 4 × 81/40 × 81 = 324/3240 - Likewise, for the 2nd fraction, since 81 × 40 = 3240,
7/81 = 7 × 40/81 × 40 = 280/3240 - Subtract the two like fractions:
324/3240 - 280/3240 = 324 - 280/3240 = 44/3240 - After reducing the fraction, the answer is 11/810
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