Subtract 10/81 from 40/18
1st number: 2 4/18, 2nd number: 10/81
40/18 - 10/81 is 170/81.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 81 is 162
Next, find the equivalent fraction of both fractional numbers with denominator 162 - For the 1st fraction, since 18 × 9 = 162,
40/18 = 40 × 9/18 × 9 = 360/162 - Likewise, for the 2nd fraction, since 81 × 2 = 162,
10/81 = 10 × 2/81 × 2 = 20/162 - Subtract the two like fractions:
360/162 - 20/162 = 360 - 20/162 = 340/162 - After reducing the fraction, the answer is 170/81
- In mixed form: 28/81
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