Add 27/18 and 28/20
1st number: 1 9/18, 2nd number: 1 8/20
27/18 + 28/20 is 29/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 18 × 10 = 180,
27/18 = 27 × 10/18 × 10 = 270/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
28/20 = 28 × 9/20 × 9 = 252/180 - Add the two like fractions:
270/180 + 252/180 = 270 + 252/180 = 522/180 - 522/180 simplified gives 29/10
- So, 27/18 + 28/20 = 29/10
In mixed form: 29/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/18+28/20 27/18+56/20 27/36+28/20 27/18+28/40 81/18+28/20 27/18+84/20 27/54+28/20 27/18+28/60 27/90+28/20