Add 15/45 and 30/20
1st number: 15/45, 2nd number: 1 10/20
15/45 + 30/20 is 11/6.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 45 × 4 = 180,
15/45 = 15 × 4/45 × 4 = 60/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
30/20 = 30 × 9/20 × 9 = 270/180 - Add the two like fractions:
60/180 + 270/180 = 60 + 270/180 = 330/180 - 330/180 simplified gives 11/6
- So, 15/45 + 30/20 = 11/6
In mixed form: 15/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/45+30/20 15/45+60/20 15/90+30/20 15/45+30/40 15/45+90/20 15/45+30/60 75/45+30/20