Question

A forest covers 43,000 acres. A survey finds that 0.2% of the forest is old-growth trees. How many acres of old-growth trees are there?

Answer 1

8,600 acres are old-growth trees.

Explanation:

You can find this by multiplying the percentage by the overall number of acres

20% * 43,000 = 8,600

Answer 2

There are 86 acres of old-growth trees.

Explanation:

In order to answer the question, we need to calculate the 0.2% of 43,000.

We can calculate this stating that exists a linear relationship between the percentage and the amount of acres. We also need to state that 43,000 acres are the 100% of the acres.

Therefore, we can write the following equation to calculate the percentage :

`(43,000)/(100)=(x)/(0.2)`

If we solve the equation in terms of ''x'' :

`x=((43,000)/(100)).(0.2)=86`

`x=86`

We find that if 43,000 acres are the 100% of the acres ⇒ The 0.2% of the acres are 86 acres (in which there are old-growth trees).