Math 8
Practice 5.3 Percent of change. Markups and Markdowns.
Complete the graphing organizer. Use the word bank: discount, more than, new amount, markup, decrease, increase.
Find each percent of change. Round to the nearest tenth if necessary.
State whether the percent of change is an increase or a decrease.
1. original: 8 points
new: 10 points
2. original: 45 inches
new: 48 inches
3. original: $60
new: $48
4. original: $750
new: $690
5. original: 25 miles
new: 36 miles
6. original: 12 fouls
new: 8 fouls
Find the selling price for each item given the cost to the store and the percent of markup.
7. backpack: $14, 40% markup
8. soccer ball: $22, 35% markup
9. music CD: $9, 45% markup
Find the sale price of each item to the nearest cent.
11. book: $29, 25% off
12. sofa: $975, 30% off
13. jeans: $34.95, 40% off
Find each percent of change. Round to the nearest tenth if necessary.
14. What is the percent of markup on a $120 cell phone
that sells for $149?
15. Find the percent of markup on a $50 pair of shoes
that sells for $60.
16. Find the percent of discount on a $45 jacket that
regularly sells for $75.
17. Find the sales tax rate if $123 worth of groceries
ultimately cost $130
18. Last year the chess club had 20 members. This year
the club has 15 members. Find the percent of change,
and state whether the percent of change is an increase
or decrease.
19. During Gary’s junior year he read 15 books. In his
senior year he read 18 books. Find the percent of change
and state whether it is percent of increase or decrease?
20. The price on bus tickets increased from $8 to $40. At
the same time the price for metro ticket grew from $10
to $60. Calculate their rates of change to find out prices
on which transportation grew more?
21. In Bank A deposited $12000 became $12840 by the
end of the year. In Bank B during the same period of time
$15000 became $15900. Which bank gave you a better
deal?
22. a) Find the rate of change of the number of
wild California Condors between 1966 and 1990.
b) Find the corresponding % of change.
c) During which two-year period did the number of condors in captivity increase the most? ____________