Subtract 50/81 from 20/9
1st number: 2 2/9, 2nd number: 50/81
20/9 - 50/81 is 130/81.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 81 is 81
Next, find the equivalent fraction of both fractional numbers with denominator 81 - For the 1st fraction, since 9 × 9 = 81,
20/9 = 20 × 9/9 × 9 = 180/81 - Likewise, for the 2nd fraction, since 81 × 1 = 81,
50/81 = 50 × 1/81 × 1 = 50/81 - Subtract the two like fractions:
180/81 - 50/81 = 180 - 50/81 = 130/81 - In mixed form: 149/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/9-50/81 20/18-50/81 60/9-50/81 20/27-50/81 20/45-50/81 20/63-50/81