Subtract 20/81 from 56/75
56/75 - 20/81 is 1012/2025.
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,
56/75 = 56 × 27/75 × 27 = 1512/2025 - Likewise, for the 2nd fraction, since 81 × 25 = 2025,
20/81 = 20 × 25/81 × 25 = 500/2025 - Subtract the two like fractions:
1512/2025 - 500/2025 = 1512 - 500/2025 = 1012/2025
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/75-40/81 56/75-60/81