Add 15/40 and 12/9
1st number: 15/40, 2nd number: 1 3/9
15/40 + 12/9 is 41/24.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 9 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 40 × 9 = 360,
15/40 = 15 × 9/40 × 9 = 135/360 - Likewise, for the 2nd fraction, since 9 × 40 = 360,
12/9 = 12 × 40/9 × 40 = 480/360 - Add the two like fractions:
135/360 + 480/360 = 135 + 480/360 = 615/360 - 615/360 simplified gives 41/24
- So, 15/40 + 12/9 = 41/24
In mixed form: 117/24
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/40+12/9 15/40+24/9 15/80+12/9 15/40+12/18 45/40+12/9 15/40+36/9 15/40+12/27 75/40+12/9 15/40+60/9 15/40+12/45 15/40+84/9 15/40+12/63