To find out what number 9 is 30% of, you can use the formula:
\[ \text{Percentage} = \left( \frac{\text{Part}}{\text{Whole}} \right) \times 100 \]
In this case, you need to find the "Whole" (let's call it \( x \)).
Given that 9 is 30% of \( x \), you can set up the equation:
\[ 9 = 0.30 \times x \]
To find \( x \), divide both sides by 0.30:
\[ x = \frac{9}{0.30} \]
Now, calculate \( x \):
\[ x = 30 \]
Therefore, 9 is 30% of 30.