Question

Kaleb bought a DVD recorder for $280. Now, it's on sale for $220. Find the percent of change in the price. Round to the nearest percent if necessary.

Answer 1

Answer: There was a change of 21.43% in the price.

Explanation:

To find the percent of change, we can use a proportion:

part/whole = percent/100

We are solving for the percent, so we can put a variable, x, there.

part/whole = x/100

The whole, or original price, is $280. The part, or the price of it when it is on sale, is $220.

$220/$280 = x/100

Now, we can cross-multiply and divide.

220 times 100 = 22000

22,000 divided by 280 = 78.57%

So, x = 78.57%

Now, 78.57% is NOT the answer. This percentage is the amount Kaleb is paying. We have to suptract 78.57 from 100, which gives us 21.43%.

So, the answer is that there was a change of 21.43% in the price.