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Percent Increase/Decrease
Rewriting Percent Expressions
Applications of Percent
Commission, Percent Error, Fees
Converting Units
100
If the original price of a bike is $110 and the new price is $96, what is the percent decrease?
13%
100
Dana buys dress shirts from a clothing manufacturer for s dollars each and then sells the dress shirts in her store at a 35% markup. Write the markup as a decimal and then write two expressions for the retail price of the dress shirt.
0.35s ; s+0.35 or 1.35s
100
You have $550 in a savings account that earns 3% simple interest each year. How much will be in your account in 10 years?
550x0.03=16.50x10=165+550= $715
100
Find the commission on $3,580 in sales when the commission is paid at 6%
$214.80
100
Convert 12 qt to liters.
11.3 L
200
If the original price of a scooter is $45 and the new price is $56, what is the percent increase?
24%
200
Find the sale price of an item whose original price is $45 and is on sale for 22% off
$35.10
200
A jeweler buys a ring from a jewelry maker for $125. He marks up the price by 135% for sale in his store. What is the selling price of the ring with 7.5% sales tax?
$315.78
200
At a local community college the fee to register for classes is 2.25% of total class tuition. If the total class tuition is $3,300, what is the registration fee?
$74.25
200
$150 per hour is how much per minute?
$2.50 per minute
300
If the original price of a tennis racket is $79 and the price is increased by 5%, what is the new price?
$82.95
300
A bookstore manager marks down the price of older hardcover books, which originally sell for b dollars, by 46%. What is the sale price of a hardcover book for which the original retail price was $29?
$15.66
300
Danielle earns a 7.25% commission on everything she sells at the electronics store where she works. She also earns a base salary of $750 per week. How much did she earn last week if she sold $4,500 in electronics merchandise? Round to the nearest cent.
$1076.25
300
John's measures the mass of a 250 gram standard mass with a balance. John's measure is 249.7 grams. What is the percent error of his balance?
0.12%
300
An arctic tern flew 11,000 miles in 115 days. How many feet per minute did the bird average?
350.72 feet per minute
400
If a set of skis are 25% off and the original price of the skis is $580, what is the sale price of the skis?
$435
400
Grady marks down some $2.49 pens to $1.99 for a week and then marks them back up to $2.49. Find the percent of increase and the percent of decrease to the nearest tenth. Are the percents of change the same for both price changes? If not, which is a greater change?
20.1% decrease, 25.1% increase. % increase is greater
400
Marcus can choose between a months salary of $1500 plus 5.5% of sales or $2,400 plus 3% of sales. He expects sales between $5,000 and $10,000 a month. Which salary option should he choose?
The second option. He would make between $2,500 and $2,700 and month with the second option. With the first option he would make between $1,775 and $2,050 per month
400
A 10 gram mass measures 9.5 grams. What is the percent error?
5%
400
A sneeze can travel up to 100 mi/h. How many feet per second is this?
146.67 ft/s
500
Suppose an amount increases by 100%, then decreases by 100%. Find the final amount. Would the situation change if the original increase was 150%?
Final amount is always 0. A 100% decrease of any amount would leave 0, so the situation does not change.
500
Your family needs a set of 4 tires. Which of the following deals would you prefer and why? : (1) Buy 3, get one free (2) 20% off (3) 1/4 off
1 and 3 - both give a discount of 25% which is greater than 20%
500
Two stores are having sales on the same shirts. The sale at store 1 is "2 shirts for $22" and the sale at store 2 is "Each $12.99 shirt is 10% off". How much will you save by buying from store 1?
Store 1 charges $11 per shirt. Store 2 charges $11.69 per shirt so you would save $0.69 per shirt.
500
A company manufactures lightweight skateboard decks. The specified weight of a deck is 1.40 kg, with a percent error of 0.45%. Is a 1.407 kg deck acceptable?
The percent error is 0.5% which is greater than 0.45% so the deck is not acceptable.
500
At one time, trains were not permitted to go faster than 12 mi/h. How many yards per minute is this?
352 yd/min