Add 45/18 and 80/10
1st number: 2 9/18, 2nd number: 8 0/10
45/18 + 80/10 is 21/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 10 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 10 × 9 = 90,
80/10 = 80 × 9/10 × 9 = 720/90 - Add the two like fractions:
225/90 + 720/90 = 225 + 720/90 = 945/90 - 945/90 simplified gives 21/2
- So, 45/18 + 80/10 = 21/2
In mixed form: 101/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/18+80/10 45/36+80/10 45/18+80/20 45/54+80/10 45/18+80/30 45/90+80/10 45/18+80/50 45/18+80/70