Add 75/20 and 80/9
1st number: 3 15/20, 2nd number: 8 8/9
75/20 + 80/9 is 455/36.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 9 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
75/20 = 75 × 9/20 × 9 = 675/180 - Likewise, for the 2nd fraction, since 9 × 20 = 180,
80/9 = 80 × 20/9 × 20 = 1600/180 - Add the two like fractions:
675/180 + 1600/180 = 675 + 1600/180 = 2275/180 - 2275/180 simplified gives 455/36
- So, 75/20 + 80/9 = 455/36
In mixed form: 1223/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/40+80/9 75/20+80/18 75/60+80/9 75/20+80/27 75/20+80/45 75/20+80/63