Question

The price of a four star dinner was $100 two decades ago. A report says that a dinner is 250% of what it was 20 years ago, how much would it cost today?

Answer 1

For this case we can solve the problem by means of the following rule of three:

100 $ --------------> 100%

x -------------------> 250%

From here, we clear the value of x.

We have then:

$x = (\frac{250}{100}) (100)$

Rewriting we have:

$x = 250$

Answer:

The price of a four star dinner today is $ 250.