If a marine ecosystem has 500 fish and 30% of them are herbivores, how many herb

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Question: If a marine ecosystem has 500 fish and 30% of them are herbivores, how many herbivorous fish are there?

Options:

Correct Answer: 150

Solution:

30% of 500 is 150, so there are 150 herbivorous fish.

If a marine ecosystem has 500 fish and 30% of them are herbivores, how many herbivorous fish are there?

If a marine ecosystem has 500 fish and 30% of them are herbivores, how many herbivorous fish are there?

Step 1: Understand that we have a total of 500 fish in the marine ecosystem.
Step 2: Know that 30% means 30 out of every 100 fish are herbivores.
Step 3: To find out how many fish are herbivores, we need to calculate 30% of 500.
Step 4: Convert 30% to a decimal by dividing 30 by 100, which gives us 0.30.
Step 5: Multiply the total number of fish (500) by the decimal (0.30): 500 * 0.30.
Step 6: Calculate the result: 500 * 0.30 = 150.
Step 7: Conclude that there are 150 herbivorous fish in the ecosystem.

Percentage Calculation – Understanding how to calculate a percentage of a total quantity.
Basic Arithmetic – Applying multiplication to find the number of herbivorous fish based on the percentage.