Subtract 9/10 from 81/40
1st number: 2 1/40, 2nd number: 9/10
81/40 - 9/10 is 9/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 10 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 40 × 1 = 40,
81/40 = 81 × 1/40 × 1 = 81/40 - Likewise, for the 2nd fraction, since 10 × 4 = 40,
9/10 = 9 × 4/10 × 4 = 36/40 - Subtract the two like fractions:
81/40 - 36/40 = 81 - 36/40 = 45/40 - After reducing the fraction, the answer is 9/8
- In mixed form: 11/8
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