Answer:
16.67%
Explanation:
The percentage of the increase can be calculated as:
[tex]\frac{v_f-v_i}{v_i}\times100[/tex]Where vf is the final value and vi is the initial value. So, we can replace vi with $9 and vf by $10.50 to get:
[tex]\frac{10.50-9}{9}\times100=\frac{1.5}{9}\times100=0.1667\times100=16.67\text{ \%}[/tex]Therefore, the answer is 16.67%
