Add 40/80 and 4/9
40/80 + 4/9 is 17/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 9 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,
40/80 = 40 × 9/80 × 9 = 360/720 - Likewise, for the 2nd fraction, since 9 × 80 = 720,
4/9 = 4 × 80/9 × 80 = 320/720 - Add the two like fractions:
360/720 + 320/720 = 360 + 320/720 = 680/720 - 680/720 simplified gives 17/18
- So, 40/80 + 4/9 = 17/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/80+8/9 40/80+4/18 40/80+12/9 40/80+4/27 40/80+20/9 40/80+4/45 40/80+28/9 40/80+4/63