Add 12/40 and 3/9
12/40 + 3/9 is 19/30.
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,
3/9 = 3 × 40/9 × 40 = 120/360 - Add the two like fractions:
108/360 + 120/360 = 108 + 120/360 = 228/360 - 228/360 simplified gives 19/30
- So, 12/40 + 3/9 = 19/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/40+3/9 12/40+6/9 12/80+3/9 12/40+3/18 36/40+3/9 12/40+3/27 60/40+3/9 12/40+15/9 12/40+3/45 84/40+3/9 12/40+21/9 12/40+3/63