Subtract 2/81 from 5/2
1st number: 2 1/2, 2nd number: 2/81
5/2 - 2/81 is 401/162.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 81 is 162
Next, find the equivalent fraction of both fractional numbers with denominator 162 - For the 1st fraction, since 2 × 81 = 162,
5/2 = 5 × 81/2 × 81 = 405/162 - Likewise, for the 2nd fraction, since 81 × 2 = 162,
2/81 = 2 × 2/81 × 2 = 4/162 - Subtract the two like fractions:
405/162 - 4/162 = 405 - 4/162 = 401/162 - In mixed form: 277/162
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/2-2/81 5/2-4/81 5/4-2/81 15/2-2/81 5/2-6/81 5/6-2/81 25/2-2/81 5/2-10/81 5/10-2/81 35/2-2/81 5/2-14/81 5/14-2/81