Subtract 18/81 from 27/75
27/75 - 18/81 is 31/225.
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,
27/75 = 27 × 27/75 × 27 = 729/2025 - Likewise, for the 2nd fraction, since 81 × 25 = 2025,
18/81 = 18 × 25/81 × 25 = 450/2025 - Subtract the two like fractions:
729/2025 - 450/2025 = 729 - 450/2025 = 279/2025 - After reducing the fraction, the answer is 31/225
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/75-18/81 27/75-36/81 81/75-18/81 27/75-54/81 27/75-90/81