Add 45/18 and 28/5
1st number: 2 9/18, 2nd number: 5 3/5
45/18 + 28/5 is 81/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 5 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 5 × 18 = 90,
28/5 = 28 × 18/5 × 18 = 504/90 - Add the two like fractions:
225/90 + 504/90 = 225 + 504/90 = 729/90 - 729/90 simplified gives 81/10
- So, 45/18 + 28/5 = 81/10
In mixed form: 81/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/18+28/5 45/18+56/5 45/36+28/5 45/18+28/10 45/18+84/5 45/54+28/5 45/18+28/15 45/90+28/5 45/18+28/25 45/18+28/35