Subtract 5/81 from 15/3
1st number: 5 0/3, 2nd number: 5/81
15/3 - 5/81 is 400/81.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 81 is 81
Next, find the equivalent fraction of both fractional numbers with denominator 81 - For the 1st fraction, since 3 × 27 = 81,
15/3 = 15 × 27/3 × 27 = 405/81 - Likewise, for the 2nd fraction, since 81 × 1 = 81,
5/81 = 5 × 1/81 × 1 = 5/81 - Subtract the two like fractions:
405/81 - 5/81 = 405 - 5/81 = 400/81 - In mixed form: 476/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/3-5/81 15/3-10/81 15/6-5/81 45/3-5/81 15/3-15/81 15/9-5/81 75/3-5/81 15/3-25/81 15/3-35/81 15/21-5/81