Add 15/45 and 9/4
1st number: 15/45, 2nd number: 2 1/4
15/45 + 9/4 is 31/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 4 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 4 × 45 = 180,
9/4 = 9 × 45/4 × 45 = 405/180 - Add the two like fractions:
60/180 + 405/180 = 60 + 405/180 = 465/180 - 465/180 simplified gives 31/12
- So, 15/45 + 9/4 = 31/12
In mixed form: 27/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/45+9/4 15/45+18/4 15/90+9/4 15/45+9/8 15/45+27/4 15/45+9/12 75/45+9/4 15/45+45/4 15/45+9/20 15/45+63/4 15/45+9/28