Add 12/36 and 20/90
12/36 + 20/90 is 5/9.
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,
12/36 = 12 × 5/36 × 5 = 60/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
20/90 = 20 × 2/90 × 2 = 40/180 - Add the two like fractions:
60/180 + 40/180 = 60 + 40/180 = 100/180 - 100/180 simplified gives 5/9
- So, 12/36 + 20/90 = 5/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/36+20/90 12/36+40/90 12/72+20/90 12/36+60/90 60/36+20/90 84/36+20/90