Subtract 9/81 from 21/75
21/75 - 9/81 is 38/225.
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,
21/75 = 21 × 27/75 × 27 = 567/2025 - Likewise, for the 2nd fraction, since 81 × 25 = 2025,
9/81 = 9 × 25/81 × 25 = 225/2025 - Subtract the two like fractions:
567/2025 - 225/2025 = 567 - 225/2025 = 342/2025 - After reducing the fraction, the answer is 38/225
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