Answer:
Step-by-step explanation:
%increase is given as = increase/ original prices ×100
Increase = new cost - original cost
The original average cost is $16000,
And the new average cost is $28,000
Then,
Increase = 28000-16000
Increase =$12,000
Then,
%increase=increase/original cost ×100
%increase = 12000/16000 ×100
%increase=75%
The rate of increase of the automobile cost is 75%