Subtract 27/81 from 18/75
18/75 - 27/81 is -7/75.
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,
18/75 = 18 × 27/75 × 27 = 486/2025 - Likewise, for the 2nd fraction, since 81 × 25 = 2025,
27/81 = 27 × 25/81 × 25 = 675/2025 - Subtract the two like fractions:
486/2025 - 675/2025 = 486 - 675/2025 = -189/2025 - After reducing the fraction, the answer is -7/75
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/75-27/81 18/75-54/81 54/75-27/81 90/75-27/81