Add 20/9 and 84/72
1st number: 2 2/9, 2nd number: 1 12/72
20/9 + 84/72 is 61/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 72 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 9 × 8 = 72,
20/9 = 20 × 8/9 × 8 = 160/72 - Likewise, for the 2nd fraction, since 72 × 1 = 72,
84/72 = 84 × 1/72 × 1 = 84/72 - Add the two like fractions:
160/72 + 84/72 = 160 + 84/72 = 244/72 - 244/72 simplified gives 61/18
- So, 20/9 + 84/72 = 61/18
In mixed form: 37/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/9+84/72 20/18+84/72 60/9+84/72 20/27+84/72 20/45+84/72 20/63+84/72