ANSWER
75.00 %
EXPLANATION
The former height of the tree is 60 inches.
The new height is 105 inches.
First, let's find the increase:
Increase = New height - Former height
Increase = 105 - 60
Increase = 45 inches
To find the percent increase, we will use the formula below:
[tex]\text{\% increase = }\frac{increase}{former}\cdot\text{ 100}[/tex]Therefore:
[tex]\text{\% increase = }\frac{45}{60}\cdot\text{ 100 = 75.00 \%}[/tex]