Add 45/18 and 80/30
1st number: 2 9/18, 2nd number: 2 20/30
45/18 + 80/30 is 31/6.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 30 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
45/18 = 45 × 5/18 × 5 = 225/90 - Likewise, for the 2nd fraction, since 30 × 3 = 90,
80/30 = 80 × 3/30 × 3 = 240/90 - Add the two like fractions:
225/90 + 240/90 = 225 + 240/90 = 465/90 - 465/90 simplified gives 31/6
- So, 45/18 + 80/30 = 31/6
In mixed form: 51/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/18+80/30 45/36+80/30 45/18+80/60 45/54+80/30 45/18+80/90 45/90+80/30