Subtract 21/81 from 63/75
63/75 - 21/81 is 392/675.
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,
63/75 = 63 × 27/75 × 27 = 1701/2025 - Likewise, for the 2nd fraction, since 81 × 25 = 2025,
21/81 = 21 × 25/81 × 25 = 525/2025 - Subtract the two like fractions:
1701/2025 - 525/2025 = 1701 - 525/2025 = 1176/2025 - After reducing the fraction, the answer is 392/675
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