Pg 324 (336) - Q15
If you have a shirt that costs $5, and you increase the price of that shirt 400%, that shirt is now going to cost $25 because you've added the $20(the 400% increase) to the price of $5. Therefore, it would have a value of 5 x 5, or 5W, which would equal the value here of 5W; therefore, your answer here is C, that both values are equal.