Add 45/80 and 8/9
45/80 + 8/9 is 209/144.
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,
45/80 = 45 × 9/80 × 9 = 405/720 - Likewise, for the 2nd fraction, since 9 × 80 = 720,
8/9 = 8 × 80/9 × 80 = 640/720 - Add the two like fractions:
405/720 + 640/720 = 405 + 640/720 = 1045/720 - 1045/720 simplified gives 209/144
- So, 45/80 + 8/9 = 209/144
In mixed form: 165/144
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/80+8/9 45/80+16/9 45/80+8/18 45/80+24/9 45/80+8/27 45/80+40/9 45/80+8/45 45/80+56/9 45/80+8/63