IXL | Percent of change: word problems

Maya loves to compete in triathlons. At a race a few months ago, she finished in 230 minutes. Yesterday, she completed another triathlon and finished in 207 minutes. What was the percent of decrease in Maya's finishing time?

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question

Katy has been keeping an eye on an emerald ring she likes. Its original price was $30,590. After being marked down for a clearance sale, it is now $15,295. By what percent has the price of the ring gone down?

key idea

percent of change

amount of change

original amount

solution

Plug $30,590 and $15,295 into the formula for percent of change and simplify.

percent of change

amount of change

original amount

30,590

–

15,295

30,590

15,295

30,590

0.5

Write the number as a percent.

0.5

50%

The price of the ring has gone down by 50%.

Looking for more? Try these:

Lesson: Percent change

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Work it out

Not feeling ready yet? These can help:

O.10Percent of change

O.7Percents of numbers: word problems

O.9Solve percent equations: word problems

Lesson: Percent change

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