Answer:
Option D -

Explanation:
Given : Last year, the price of the hamburger Wonderful Whopper was $2.40. This year the price increased to $2.70. If p is the percent increase in the price of the Whopper.
To find : Which proportion can be used to compute p?
Solution :
Original price - $2.40
New price - $2.70
Percentage increase = p
The increased in percentage formula is

Substitute the value,

or

Therefore, option D is correct.