Add 40/12 and 15/9
1st number: 3 4/12, 2nd number: 1 6/9
40/12 + 15/9 is 5/1.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 9 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 12 × 3 = 36,
40/12 = 40 × 3/12 × 3 = 120/36 - Likewise, for the 2nd fraction, since 9 × 4 = 36,
15/9 = 15 × 4/9 × 4 = 60/36 - Add the two like fractions:
120/36 + 60/36 = 120 + 60/36 = 180/36 - 180/36 simplified gives 5/1
- So, 40/12 + 15/9 = 5/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/12+15/9 40/12+30/9 40/24+15/9 40/12+15/18 40/12+45/9 40/36+15/9 40/12+15/27 40/12+75/9 40/60+15/9 40/12+15/45 40/84+15/9 40/12+15/63