Add 27/18 and 81/30
1st number: 1 9/18, 2nd number: 2 21/30
27/18 + 81/30 is 21/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 30 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
27/18 = 27 × 5/18 × 5 = 135/90 - Likewise, for the 2nd fraction, since 30 × 3 = 90,
81/30 = 81 × 3/30 × 3 = 243/90 - Add the two like fractions:
135/90 + 243/90 = 135 + 243/90 = 378/90 - 378/90 simplified gives 21/5
- So, 27/18 + 81/30 = 21/5
In mixed form: 41/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/18+81/30 27/36+81/30 27/18+81/60 81/18+81/30 27/54+81/30 27/18+81/90 27/90+81/30