Subtract 7/81 from 75/12
1st number: 6 3/12, 2nd number: 7/81
75/12 - 7/81 is 1997/324.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 81 is 324
Next, find the equivalent fraction of both fractional numbers with denominator 324 - For the 1st fraction, since 12 × 27 = 324,
75/12 = 75 × 27/12 × 27 = 2025/324 - Likewise, for the 2nd fraction, since 81 × 4 = 324,
7/81 = 7 × 4/81 × 4 = 28/324 - Subtract the two like fractions:
2025/324 - 28/324 = 2025 - 28/324 = 1997/324 - In mixed form: 653/324
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/12-14/81 75/24-7/81 75/12-21/81 75/36-7/81 75/12-35/81 75/60-7/81 75/12-49/81 75/84-7/81