Subtract 7/81 from 90/40
1st number: 2 10/40, 2nd number: 7/81
90/40 - 7/81 is 701/324.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 81 is 3240
Next, find the equivalent fraction of both fractional numbers with denominator 3240 - For the 1st fraction, since 40 × 81 = 3240,
90/40 = 90 × 81/40 × 81 = 7290/3240 - Likewise, for the 2nd fraction, since 81 × 40 = 3240,
7/81 = 7 × 40/81 × 40 = 280/3240 - Subtract the two like fractions:
7290/3240 - 280/3240 = 7290 - 280/3240 = 7010/3240 - After reducing the fraction, the answer is 701/324
- In mixed form: 253/324
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