Add 15/45 and 12/9
1st number: 15/45, 2nd number: 1 3/9
15/45 + 12/9 is 5/3.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 9 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 45 × 1 = 45,
15/45 = 15 × 1/45 × 1 = 15/45 - Likewise, for the 2nd fraction, since 9 × 5 = 45,
12/9 = 12 × 5/9 × 5 = 60/45 - Add the two like fractions:
15/45 + 60/45 = 15 + 60/45 = 75/45 - 75/45 simplified gives 5/3
- So, 15/45 + 12/9 = 5/3
In mixed form: 12/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/45+12/9 15/45+24/9 15/90+12/9 15/45+12/18 15/45+36/9 15/45+12/27 75/45+12/9 15/45+60/9 15/45+12/45 15/45+84/9 15/45+12/63