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A certain ecosystem has a total of 500 species. If 15% are mammals, how many mam

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Question: A certain ecosystem has a total of 500 species. If 15% are mammals, how many mammal species are there?

Options:

  1. 60
  2. 75
  3. 80
  4. 90

Correct Answer: 75

Solution: 

15% of 500 is 0.15 * 500 = 75.

A certain ecosystem has a total of 500 species. If 15% are mammals, how many mam

Practice Questions

Q1
A certain ecosystem has a total of 500 species. If 15% are mammals, how many mammal species are there?
  1. 60
  2. 75
  3. 80
  4. 90

Questions & Step-by-Step Solutions

A certain ecosystem has a total of 500 species. If 15% are mammals, how many mammal species are there?
  • Step 1: Understand that we need to find 15% of the total number of species, which is 500.
  • Step 2: Convert the percentage (15%) into a decimal. To do this, divide 15 by 100. This gives us 0.15.
  • Step 3: Multiply the decimal (0.15) by the total number of species (500). So, calculate 0.15 * 500.
  • Step 4: Perform the multiplication. 0.15 * 500 equals 75.
  • Step 5: Conclude that there are 75 mammal species in the ecosystem.
  • Percentage Calculation – Understanding how to calculate a percentage of a total quantity.
  • Basic Arithmetic – Applying multiplication to find a portion of a whole.
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