Add 45/4 and 80/9
1st number: 11 1/4, 2nd number: 8 8/9
45/4 + 80/9 is 725/36.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 9 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 4 × 9 = 36,
45/4 = 45 × 9/4 × 9 = 405/36 - Likewise, for the 2nd fraction, since 9 × 4 = 36,
80/9 = 80 × 4/9 × 4 = 320/36 - Add the two like fractions:
405/36 + 320/36 = 405 + 320/36 = 725/36 - So, 45/4 + 80/9 = 725/36
In mixed form: 205/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/4+80/9 45/8+80/9 45/4+80/18 45/12+80/9 45/4+80/27 45/20+80/9 45/4+80/45 45/28+80/9 45/4+80/63