Subtract 9/18 from 81/90
81/90 - 9/18 is 2/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
81/90 = 81 × 1/90 × 1 = 81/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
9/18 = 9 × 5/18 × 5 = 45/90 - Subtract the two like fractions:
81/90 - 45/90 = 81 - 45/90 = 36/90 - After reducing the fraction, the answer is 2/5
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