Subtract 18/81 from 9/75
9/75 - 18/81 is -23/225.
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,
9/75 = 9 × 27/75 × 27 = 243/2025 - Likewise, for the 2nd fraction, since 81 × 25 = 2025,
18/81 = 18 × 25/81 × 25 = 450/2025 - Subtract the two like fractions:
243/2025 - 450/2025 = 243 - 450/2025 = -207/2025 - After reducing the fraction, the answer is -23/225
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/75-18/81 9/75-36/81 27/75-18/81 9/75-54/81 45/75-18/81 9/75-90/81 63/75-18/81