Subtract 20/81 from 50/12
1st number: 4 2/12, 2nd number: 20/81
50/12 - 20/81 is 635/162.
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,
50/12 = 50 × 27/12 × 27 = 1350/324 - Likewise, for the 2nd fraction, since 81 × 4 = 324,
20/81 = 20 × 4/81 × 4 = 80/324 - Subtract the two like fractions:
1350/324 - 80/324 = 1350 - 80/324 = 1270/324 - After reducing the fraction, the answer is 635/162
- In mixed form: 3149/162
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/12-40/81 50/24-20/81 50/12-60/81 50/36-20/81 50/60-20/81 50/84-20/81