Add 18/36 and 81/30
1st number: 18/36, 2nd number: 2 21/30
18/36 + 81/30 is 16/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 30 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 36 × 5 = 180,
18/36 = 18 × 5/36 × 5 = 90/180 - Likewise, for the 2nd fraction, since 30 × 6 = 180,
81/30 = 81 × 6/30 × 6 = 486/180 - Add the two like fractions:
90/180 + 486/180 = 90 + 486/180 = 576/180 - 576/180 simplified gives 16/5
- So, 18/36 + 81/30 = 16/5
In mixed form: 31/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/72+81/30 18/36+81/60 54/36+81/30 18/36+81/90 90/36+81/30