Add 81/4 and 20/9
1st number: 20 1/4, 2nd number: 2 2/9
81/4 + 20/9 is 809/36.
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,
81/4 = 81 × 9/4 × 9 = 729/36 - Likewise, for the 2nd fraction, since 9 × 4 = 36,
20/9 = 20 × 4/9 × 4 = 80/36 - Add the two like fractions:
729/36 + 80/36 = 729 + 80/36 = 809/36 - So, 81/4 + 20/9 = 809/36
In mixed form: 2217/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/4+40/9 81/8+20/9 81/4+20/18 81/4+60/9 81/12+20/9 81/4+20/27 81/20+20/9 81/4+20/45 81/28+20/9 81/4+20/63