Subtract 10/81 from 40/20
1st number: 2 0/20, 2nd number: 10/81
40/20 - 10/81 is 152/81.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 81 is 1620
Next, find the equivalent fraction of both fractional numbers with denominator 1620 - For the 1st fraction, since 20 × 81 = 1620,
40/20 = 40 × 81/20 × 81 = 3240/1620 - Likewise, for the 2nd fraction, since 81 × 20 = 1620,
10/81 = 10 × 20/81 × 20 = 200/1620 - Subtract the two like fractions:
3240/1620 - 200/1620 = 3240 - 200/1620 = 3040/1620 - After reducing the fraction, the answer is 152/81
- In mixed form: 171/81
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