Subtract 7/81 from 42/25
1st number: 1 17/25, 2nd number: 7/81
42/25 - 7/81 is 3227/2025.
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,
42/25 = 42 × 81/25 × 81 = 3402/2025 - Likewise, for the 2nd fraction, since 81 × 25 = 2025,
7/81 = 7 × 25/81 × 25 = 175/2025 - Subtract the two like fractions:
3402/2025 - 175/2025 = 3402 - 175/2025 = 3227/2025 - In mixed form: 11202/2025
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/25-7/81 42/25-14/81 42/50-7/81 42/25-21/81 42/75-7/81 42/25-35/81 42/25-49/81