Subtract 9/81 from 7/75
7/75 - 9/81 is -4/225.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 81 is 2025
Next, find the equivalent fraction of both fractional numbers with denominator 2025 - For the 1st fraction, since 75 × 27 = 2025,
7/75 = 7 × 27/75 × 27 = 189/2025 - Likewise, for the 2nd fraction, since 81 × 25 = 2025,
9/81 = 9 × 25/81 × 25 = 225/2025 - Subtract the two like fractions:
189/2025 - 225/2025 = 189 - 225/2025 = -36/2025 - After reducing the fraction, the answer is -4/225
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