Add 12/40 and 8/9
12/40 + 8/9 is 107/90.
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,
8/9 = 8 × 40/9 × 40 = 320/360 - Add the two like fractions:
108/360 + 320/360 = 108 + 320/360 = 428/360 - 428/360 simplified gives 107/90
- So, 12/40 + 8/9 = 107/90
In mixed form: 117/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/40+8/9 12/40+16/9 12/80+8/9 12/40+8/18 36/40+8/9 12/40+24/9 12/40+8/27 60/40+8/9 12/40+40/9 12/40+8/45 84/40+8/9 12/40+56/9 12/40+8/63