Answer
Find out the percentage of the trees are oak trees .
To prove
Formula
[tex]Percentage = \frac{Part\ value\times100}{Total\ value}[/tex]
As given
In the woods there are 420 silver birch trees, 160 oak trees and 300 wood cherry trees .
Total number of trees = 420 + 160 + 300
= 880
Part value = 160 oak trees
Put all in the formula
[tex]Percentage = \frac{160\times 100}{880}[/tex]
[tex]Percentage = \frac{16000}{880}[/tex]
Percentage = 18.2 % (approx)
Therefore 18.2 % (approx) of the trees are oak trees .
