Add 90/15 and 15/81
1st number: 6 0/15, 2nd number: 15/81
90/15 + 15/81 is 167/27.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 81 is 405
Next, find the equivalent fraction of both fractional numbers with denominator 405 - For the 1st fraction, since 15 × 27 = 405,
90/15 = 90 × 27/15 × 27 = 2430/405 - Likewise, for the 2nd fraction, since 81 × 5 = 405,
15/81 = 15 × 5/81 × 5 = 75/405 - Add the two like fractions:
2430/405 + 75/405 = 2430 + 75/405 = 2505/405 - 2505/405 simplified gives 167/27
- So, 90/15 + 15/81 = 167/27
In mixed form: 65/27
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/15+30/81 90/30+15/81 90/15+45/81 90/45+15/81 90/15+75/81 90/75+15/81