Add 9/45 and 30/18
1st number: 9/45, 2nd number: 1 12/18
9/45 + 30/18 is 28/15.
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,
9/45 = 9 × 2/45 × 2 = 18/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
30/18 = 30 × 5/18 × 5 = 150/90 - Add the two like fractions:
18/90 + 150/90 = 18 + 150/90 = 168/90 - 168/90 simplified gives 28/15
- So, 9/45 + 30/18 = 28/15
In mixed form: 113/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/45+30/18 9/45+60/18 9/90+30/18 9/45+30/36 27/45+30/18 9/45+90/18 9/45+30/54 9/45+30/90 63/45+30/18