Subtract 15/75 from 1/81
1/81 - 15/75 is -76/405.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 75 is 2025
Next, find the equivalent fraction of both fractional numbers with denominator 2025 - For the 1st fraction, since 81 × 25 = 2025,
1/81 = 1 × 25/81 × 25 = 25/2025 - Likewise, for the 2nd fraction, since 75 × 27 = 2025,
15/75 = 15 × 27/75 × 27 = 405/2025 - Subtract the two like fractions:
25/2025 - 405/2025 = 25 - 405/2025 = -380/2025 - After reducing the fraction, the answer is -76/405
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