Add 84/36 and 18/90
1st number: 2 12/36, 2nd number: 18/90
84/36 + 18/90 is 38/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 90 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 36 × 5 = 180,
84/36 = 84 × 5/36 × 5 = 420/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
18/90 = 18 × 2/90 × 2 = 36/180 - Add the two like fractions:
420/180 + 36/180 = 420 + 36/180 = 456/180 - 456/180 simplified gives 38/15
- So, 84/36 + 18/90 = 38/15
In mixed form: 28/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/36+36/90 84/72+18/90 84/36+54/90