Subtract 1/18 from 90/81
1st number: 1 9/81, 2nd number: 1/18
90/81 - 1/18 is 19/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 18 is 162
Next, find the equivalent fraction of both fractional numbers with denominator 162 - For the 1st fraction, since 81 × 2 = 162,
90/81 = 90 × 2/81 × 2 = 180/162 - Likewise, for the 2nd fraction, since 18 × 9 = 162,
1/18 = 1 × 9/18 × 9 = 9/162 - Subtract the two like fractions:
180/162 - 9/162 = 180 - 9/162 = 171/162 - After reducing the fraction, the answer is 19/18
- In mixed form: 11/18
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