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Percent to Decimal/Decimal to Percent
Percent Proportion/Percent Equation
Percent Change/Percent Error
Sales Tax, Tip, Discount
Spiral Review
100
Convert 3.1 to a percent
What is 310%
100

A store paid $75.29 for a couch. To make a profit, the store charged 270% of the cost. What is the price tag the store puts on the couch?

What is $208.28

100
A custom estimates a computer at an electronics store is $1099. Determine the percent of error in price if the actual price is $1349. Round to the nearest whole percent.
What is 19%.
100
Elvia can get a $10.28 discount on a $68.53 purchase at a certain department store because she works there. What percent discount does she get?
What is 15% discount.
100

28-(-11)

39

200
Convert 120% to a decimal.
What is 1.2
200

Solve: If 12 out of 25 people like blue jolly ranchers. What percent of people like blue jolly ranchers?

What is 48% of people

200
A fruit drink that was sold in 16-ounce containers is now sold in 20-ounce containers. What is the percent of change in quantity? State whether this is an increase or a decrease.
What is 25% increase.
200
How much would a bicycle cost if it were marked down 15% from its original price of $289?
What is $245.65.
200

A machine makes 300 boxes in 15 minutes.  Which expressions equals the unit rate in boxes per hour?

a. 300 x 15

b. 300 x 1/4

c. 300 divided by 15

d. 300 divided by one fourth

c

300
Convert 4.9% to a decimal.
What is .049
300

Solve: The local bakery sells 150 donuts a day. If 70% if these donuts are sold in the morning, how many donuts are sold in the morning?

What is 105 donuts

300
On Tuesday, Nash made 231 free throws on Wednesday he made 258 free throws. What is the percent change in his free throws? Round to the nearest percent. State whether this is increase or decrease.
What is 12% increase.
300
If a sweater costs $37.99, and the sales tax is 6%, what is the total price of the sweater?
What is $40.27.
300

Jesse bought 5.3 pounds of grapes for $7.75.  Using the unit rate, how much would 3 pounds of grapes cost?

$1.46

400
Convert .008 to a percent
What is 0.8%
400

0.5% of all statistics are true. If you have a list of 1,400 statistics. How many are true?

What is 7 statistics.

400
Al's Quick Mart sells milk for $1.99 per gallon, but they used to sell it for $2.79. What is the percent change in the price? Round to the nearest whole percent. State whether this is increase or decrease.
What is 40% decrease.
400
A certain container of mouthwash usually costs $2.99 at a store. If it is on sale for 20% off, how much does the mouthwash cost now?
What is $3.59
400

A map has a scale of 1 inch=150 miles.  If a road actually measures 425 miles, how long will it be on the map?

2.83 inches

500
Convert 0.07% to a decimal
What is .0007
500

John flips a quarter. It falls on tails 6 times, if this 30% of the time. How many times did he flip a quarter.

What is 20 times.

500
A student estimates the mass of an object to be 325g. The actual mass is 342g. What is the percent error of the students calculation?
What is 5%.
500
If a stereo is sold for $59.99, and Karen pays $64.19 for it when she checks out, what is the sales tax in the area?
What is 7% tax.
500

From a rope 11 m long, two pieces of lengths 13/5 m and 33/10 m are cut off.  What is the length of the remaining rope?

51/10 or 5 1/10