Add 18/12 and 3/90
1st number: 1 6/12, 2nd number: 3/90
18/12 + 3/90 is 23/15.
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,
18/12 = 18 × 15/12 × 15 = 270/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
3/90 = 3 × 2/90 × 2 = 6/180 - Add the two like fractions:
270/180 + 6/180 = 270 + 6/180 = 276/180 - 276/180 simplified gives 23/15
- So, 18/12 + 3/90 = 23/15
In mixed form: 18/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/12+3/90 18/12+6/90 18/24+3/90 54/12+3/90 18/12+9/90 18/36+3/90 90/12+3/90 18/12+15/90 18/60+3/90 18/12+21/90 18/84+3/90