Add 81/15 and 84/90
1st number: 5 6/15, 2nd number: 84/90
81/15 + 84/90 is 19/3.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 15 × 6 = 90,
81/15 = 81 × 6/15 × 6 = 486/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
84/90 = 84 × 1/90 × 1 = 84/90 - Add the two like fractions:
486/90 + 84/90 = 486 + 84/90 = 570/90 - 570/90 simplified gives 19/3
- So, 81/15 + 84/90 = 19/3
In mixed form: 61/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/30+84/90 81/45+84/90 81/75+84/90