Add 84/15 and 9/18
1st number: 5 9/15, 2nd number: 9/18
84/15 + 9/18 is 61/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 15 × 6 = 90,
84/15 = 84 × 6/15 × 6 = 504/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
9/18 = 9 × 5/18 × 5 = 45/90 - Add the two like fractions:
504/90 + 45/90 = 504 + 45/90 = 549/90 - 549/90 simplified gives 61/10
- So, 84/15 + 9/18 = 61/10
In mixed form: 61/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/30+9/18 84/15+9/36 84/15+27/18 84/45+9/18 84/15+9/54 84/15+45/18 84/75+9/18 84/15+9/90 84/15+63/18