Add 20/36 and 50/80
20/36 + 50/80 is 85/72.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 36 × 20 = 720,
20/36 = 20 × 20/36 × 20 = 400/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
50/80 = 50 × 9/80 × 9 = 450/720 - Add the two like fractions:
400/720 + 450/720 = 400 + 450/720 = 850/720 - 850/720 simplified gives 85/72
- So, 20/36 + 50/80 = 85/72
In mixed form: 113/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/36+50/80 20/72+50/80 60/36+50/80