Chapter 3.A, Problem 1QQ

The price of a meal at a four-star restaurant is 200% more than the $ 100 it was a couple of decades ago. The current price of such a meal is
a. $200. b. $300. c. $400.

To determine

The current price of a meal at a four star restaurant if the current price is 200% more than the $100 which was the price of the meal a couple of decades ago.

Answer to Problem 1QQ

Solution: The current price of the meal at a four star restaurant is $300.

Explanation of Solution

Given: Price of the meal in the past decade is $100. The current price is 200% higher than that price.

Calculation:
Let us consider that “x” is the current price.

As per the statement, x is 200% higher than the old price of $100, so

$\begin{array}{l}x=100+200\%of100\\ x=100+200\%\times 100\\ \\ x=100+\left(\left(\frac{200}{100}\right)\times 100\right)\\ x=100+\left(2\times 100\right)\\ \\ x=100+200\\ x=300\end{array}$

Therefore, the current price of the meal is $300.