Add 20/45 and 45/18
1st number: 20/45, 2nd number: 2 9/18
20/45 + 45/18 is 53/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 45 × 2 = 90,
20/45 = 20 × 2/45 × 2 = 40/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
45/18 = 45 × 5/18 × 5 = 225/90 - Add the two like fractions:
40/90 + 225/90 = 40 + 225/90 = 265/90 - 265/90 simplified gives 53/18
- So, 20/45 + 45/18 = 53/18
In mixed form: 217/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/45+45/18 20/45+90/18 20/90+45/18 20/45+45/36 60/45+45/18 20/45+45/54 20/45+45/90