Add 90/15 and 8/81
1st number: 6 0/15, 2nd number: 8/81
90/15 + 8/81 is 494/81.
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,
8/81 = 8 × 5/81 × 5 = 40/405 - Add the two like fractions:
2430/405 + 40/405 = 2430 + 40/405 = 2470/405 - 2470/405 simplified gives 494/81
- So, 90/15 + 8/81 = 494/81
In mixed form: 68/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/15+16/81 90/30+8/81 90/15+24/81 90/45+8/81 90/15+40/81 90/75+8/81 90/15+56/81