Question

I buy the same chips every week and my bill is normally $90.00. Why am I now being charged $108 for the exact same items? What percentage has the store increased their prices?

Answer 1

Hi there! To find the percent of change, do change/original = x/100. The amount of change means to find the distance between two numbers and the original is the previous price. 108 - 90 = 18. Plug in the values in order to get 18/90 = x/100. Cross multiply the values in order to get 1,800 = 90x. Now, divide each side by 90 to isolate the variable. When you do, you get x = 20. The store increased their prices by 20%.

Answer 2

20%

Explanation:

My bill of the chips comes every week = $90

Now the store is charging for the exact same items = $108

Increase in their prices = 108 - 90 = $18

The percentage of the increased amount =
`(18)/(90)` × 100

= 0.2 × 100

= 20%

The store has increased 20% in their prices.