Add 14/12 and 84/90
1st number: 1 2/12, 2nd number: 84/90
14/12 + 84/90 is 21/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 90 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 12 × 15 = 180,
14/12 = 14 × 15/12 × 15 = 210/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
84/90 = 84 × 2/90 × 2 = 168/180 - Add the two like fractions:
210/180 + 168/180 = 210 + 168/180 = 378/180 - 378/180 simplified gives 21/10
- So, 14/12 + 84/90 = 21/10
In mixed form: 21/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 28/12+84/90 14/24+84/90 42/12+84/90 14/36+84/90 70/12+84/90 14/60+84/90 98/12+84/90 14/84+84/90