Add 84/90 and 18/12
1st number: 84/90, 2nd number: 1 6/12
84/90 + 18/12 is 73/30.
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,
84/90 = 84 × 2/90 × 2 = 168/180 - Likewise, for the 2nd fraction, since 12 × 15 = 180,
18/12 = 18 × 15/12 × 15 = 270/180 - Add the two like fractions:
168/180 + 270/180 = 168 + 270/180 = 438/180 - 438/180 simplified gives 73/30
- So, 84/90 + 18/12 = 73/30
In mixed form: 213/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/90+36/12 84/90+18/24 84/90+54/12 84/90+18/36 84/90+90/12 84/90+18/60 84/90+18/84