To find the percentage, you can use the formula:
\[ \text{Percentage} = \left( \frac{\text{Part}}{\text{Whole}} \right) \times 100 \]
In this case, the "Part" is $15,000,000 and the "Whole" is $30,000,000.
Substituting the numbers into the formula:
\[ \text{Percentage} = \left( \frac{15,000,000}{30,000,000} \right) \times 100 \]
Calculating this gives:
\[ \text{Percentage} = \left( 0.5 \right) \times 100 = 50 \]
So the statement would be completed as:
50% of $30,000,000 = $15,000,000.