Add 80/20 and 90/18
1st number: 4 0/20, 2nd number: 5 0/18
80/20 + 90/18 is 9/1.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 18 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
80/20 = 80 × 9/20 × 9 = 720/180 - Likewise, for the 2nd fraction, since 18 × 10 = 180,
90/18 = 90 × 10/18 × 10 = 900/180 - Add the two like fractions:
720/180 + 900/180 = 720 + 900/180 = 1620/180 - 1620/180 simplified gives 9/1
- So, 80/20 + 90/18 = 9/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/40+90/18 80/20+90/36 80/60+90/18 80/20+90/54