Add 18/4 and 81/90
1st number: 4 2/4, 2nd number: 81/90
18/4 + 81/90 is 27/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 90 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 4 × 45 = 180,
18/4 = 18 × 45/4 × 45 = 810/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
81/90 = 81 × 2/90 × 2 = 162/180 - Add the two like fractions:
810/180 + 162/180 = 810 + 162/180 = 972/180 - 972/180 simplified gives 27/5
- So, 18/4 + 81/90 = 27/5
In mixed form: 52/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/4+81/90 18/8+81/90 54/4+81/90 18/12+81/90 90/4+81/90 18/20+81/90 18/28+81/90