Final answer:
30% of Dr. Gray's fish are clown fish, calculated by dividing the number of clown fish by the total number of fish and then multiplying by 100.
Step-by-step explanation:
To find out what percent of Dr. Gray's fish are clown fish, you would use the formula for percentage, which is (part/whole) × 100. In this case, the part is the number of clown fish, and the whole is the total number of fish in the aquarium. Therefore, you would calculate as follows:
- Divide the number of clown fish by the total number of fish: 9 clown fish ÷ 30 total fish = 0.3.
- Multiply the result by 100 to get the percentage: 0.3 × 100 = 30%.
So, 30% of Dr. Gray's fish are clown fish.