Add 81/90 and 2/12
81/90 + 2/12 is 16/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 12 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 12 × 15 = 180,
2/12 = 2 × 15/12 × 15 = 30/180 - Add the two like fractions:
162/180 + 30/180 = 162 + 30/180 = 192/180 - 192/180 simplified gives 16/15
- So, 81/90 + 2/12 = 16/15
In mixed form: 11/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/90+4/12 81/90+2/24 81/90+6/12 81/90+2/36 81/90+10/12 81/90+2/60 81/90+14/12 81/90+2/84