Add 20/72 and 30/9
1st number: 20/72, 2nd number: 3 3/9
20/72 + 30/9 is 65/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 9 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 72 × 1 = 72,
20/72 = 20 × 1/72 × 1 = 20/72 - Likewise, for the 2nd fraction, since 9 × 8 = 72,
30/9 = 30 × 8/9 × 8 = 240/72 - Add the two like fractions:
20/72 + 240/72 = 20 + 240/72 = 260/72 - 260/72 simplified gives 65/18
- So, 20/72 + 30/9 = 65/18
In mixed form: 311/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/72+30/9 20/72+60/9 20/72+30/18 60/72+30/9 20/72+90/9 20/72+30/27 20/72+30/45 20/72+30/63