Growing trees

This task is about working out the percentage increase of the heights of trees.
 
The heights of the trees below were measured in 2018.
 
The Pine tree measured 3 metres and the Poplar tree 4 metres.
 
 

Pine Tree 2018

Poplar Tree 2018

Question 2Change answer

a)  By 2022, the Pine Tree had grown by 60% of its 2018 height.
     How high was the tree in 2022?   metres.

Question 2Change answer

b)  By 2022, the Poplar Tree had grown by 55% of its 2018 height.  
     How high was the Poplar Tree in 2022?  metres.

Question 2Change answer

c)  In 2020, the Pine Tree was 4 metres high.
     By what percentage had it grown since 2018? %