Subtract 1/81 from 12/25
12/25 - 1/81 is 947/2025.
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,
12/25 = 12 × 81/25 × 81 = 972/2025 - Likewise, for the 2nd fraction, since 81 × 25 = 2025,
1/81 = 1 × 25/81 × 25 = 25/2025 - Subtract the two like fractions:
972/2025 - 25/2025 = 972 - 25/2025 = 947/2025
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/25-1/81 12/25-2/81 12/50-1/81 36/25-1/81 12/25-3/81 12/75-1/81 60/25-1/81 12/25-5/81 84/25-1/81 12/25-7/81