hey!!!
according to the question, there are 420 silver birch trees, 160 oak trees and 300 wild berry trees.
we have to find the percentage of the oak trees.
total number of trees = 420 + 160 + 300
= 880 trees
no. of oak trees is given = 160
therefore it's percentage = 160/880 × 100
= 16/88 × 100
= 2/11 × 100
= 200/11
= 18.18% (approx.)
cheers!!!