Subtract 90/81 from 2/5
1st number: 2/5, 2nd number: 1 9/81
2/5 - 90/81 is -32/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 81 is 405
Next, find the equivalent fraction of both fractional numbers with denominator 405 - For the 1st fraction, since 5 × 81 = 405,
2/5 = 2 × 81/5 × 81 = 162/405 - Likewise, for the 2nd fraction, since 81 × 5 = 405,
90/81 = 90 × 5/81 × 5 = 450/405 - Subtract the two like fractions:
162/405 - 450/405 = 162 - 450/405 = -288/405 - After reducing the fraction, the answer is -32/45
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