Add 12/40 and 18/9
1st number: 12/40, 2nd number: 2 0/9
12/40 + 18/9 is 23/10.
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,
12/40 = 12 × 9/40 × 9 = 108/360 - Likewise, for the 2nd fraction, since 9 × 40 = 360,
18/9 = 18 × 40/9 × 40 = 720/360 - Add the two like fractions:
108/360 + 720/360 = 108 + 720/360 = 828/360 - 828/360 simplified gives 23/10
- So, 12/40 + 18/9 = 23/10
In mixed form: 23/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/40+18/9 12/40+36/9 12/80+18/9 36/40+18/9 12/40+54/9 12/40+18/27 60/40+18/9 12/40+90/9 12/40+18/45 84/40+18/9 12/40+18/63