Subtract 10/81 from 40/5
1st number: 8 0/5, 2nd number: 10/81
40/5 - 10/81 is 638/81.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 81 is 405
Next, find the equivalent fraction of both fractional numbers with denominator 405 - For the 1st fraction, since 5 × 81 = 405,
40/5 = 40 × 81/5 × 81 = 3240/405 - Likewise, for the 2nd fraction, since 81 × 5 = 405,
10/81 = 10 × 5/81 × 5 = 50/405 - Subtract the two like fractions:
3240/405 - 50/405 = 3240 - 50/405 = 3190/405 - After reducing the fraction, the answer is 638/81
- In mixed form: 771/81
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