Add 81/90 and 27/36
81/90 + 27/36 is 33/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 36 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 90 × 2 = 180,
81/90 = 81 × 2/90 × 2 = 162/180 - Likewise, for the 2nd fraction, since 36 × 5 = 180,
27/36 = 27 × 5/36 × 5 = 135/180 - Add the two like fractions:
162/180 + 135/180 = 162 + 135/180 = 297/180 - 297/180 simplified gives 33/20
- So, 81/90 + 27/36 = 33/20
In mixed form: 113/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/90+54/36 81/90+27/72 81/90+81/36