Question

Work out the percentage change to 2 decimal places when a price of £99 is increased to £111.

Answer 1

Answer:

0.12

Step-by-step explanation:

The percentage change formula depends if the price goes up or down. Since this goes up, we have the positive percentage change formula. This is $\frac{ a_n - a_1}{a_1}$ where $a_n$ is the new price and $a_1$ is the original price. Plugging in our values, we get $\frac{111-99}{99} = \frac{12}{99} = 0.\overline{12}$ . Since this is to two decimal places we get 0.12 as our answer.