Add 81/20 and 80/9
1st number: 4 1/20, 2nd number: 8 8/9
81/20 + 80/9 is 2329/180.
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,
81/20 = 81 × 9/20 × 9 = 729/180 - Likewise, for the 2nd fraction, since 9 × 20 = 180,
80/9 = 80 × 20/9 × 20 = 1600/180 - Add the two like fractions:
729/180 + 1600/180 = 729 + 1600/180 = 2329/180 - So, 81/20 + 80/9 = 2329/180
In mixed form: 12169/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/40+80/9 81/20+80/18 81/60+80/9 81/20+80/27 81/20+80/45 81/20+80/63