Add 81/18 and 15/3
1st number: 4 9/18, 2nd number: 5 0/3
81/18 + 15/3 is 19/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 3 is 18
Next, find the equivalent fraction of both fractional numbers with denominator 18 - For the 1st fraction, since 18 × 1 = 18,
81/18 = 81 × 1/18 × 1 = 81/18 - Likewise, for the 2nd fraction, since 3 × 6 = 18,
15/3 = 15 × 6/3 × 6 = 90/18 - Add the two like fractions:
81/18 + 90/18 = 81 + 90/18 = 171/18 - 171/18 simplified gives 19/2
- So, 81/18 + 15/3 = 19/2
In mixed form: 91/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/18+30/3 81/36+15/3 81/18+15/6 81/18+45/3 81/54+15/3 81/18+15/9 81/18+75/3 81/90+15/3 81/18+15/21