If a forest has 120 species of trees and 30% of them are endemic, how many endem

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Question: If a forest has 120 species of trees and 30% of them are endemic, how many endemic species are there?

Options:

Correct Answer: 36

Solution:

30% of 120 is 0.30 * 120 = 36.

If a forest has 120 species of trees and 30% of them are endemic, how many endemic species are there?

If a forest has 120 species of trees and 30% of them are endemic, how many endemic species are there?

Step 1: Understand that 'endemic' means species that are native to a specific place.
Step 2: Know that there are 120 species of trees in the forest.
Step 3: Recognize that 30% means 30 out of every 100 parts.
Step 4: To find 30% of 120, first convert 30% to a decimal. 30% as a decimal is 0.30.
Step 5: Multiply the total number of species (120) by the decimal (0.30).
Step 6: Calculate 0.30 * 120, which equals 36.
Step 7: Conclude that there are 36 endemic species of trees in the forest.

Percentage Calculation – Understanding how to calculate a percentage of a total quantity.
Basic Arithmetic – Applying multiplication to find a portion of a number.