Subtract 42/81 from 36/25
1st number: 1 11/25, 2nd number: 42/81
36/25 - 42/81 is 622/675.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 81 is 2025
Next, find the equivalent fraction of both fractional numbers with denominator 2025 - For the 1st fraction, since 25 × 81 = 2025,
36/25 = 36 × 81/25 × 81 = 2916/2025 - Likewise, for the 2nd fraction, since 81 × 25 = 2025,
42/81 = 42 × 25/81 × 25 = 1050/2025 - Subtract the two like fractions:
2916/2025 - 1050/2025 = 2916 - 1050/2025 = 1866/2025 - After reducing the fraction, the answer is 622/675
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/25-42/81 36/25-84/81 36/50-42/81 36/75-42/81