Definitions
What is a percentage of a price taken off of the original price. It is the amount you are saving and it is considered a percent decrease.
Discount
John and his family went out to eat at their favorite restaurant. The bill for the food was $65 and they left a 20% tip to the server. How much tip did they give the server?
$13
Saul is buying a new shirt from Macy's. The shirt costs $15, but there is a sign above that says 25% off. When he went to a checkout, a 7% tax was applied to her bill. How much will the shirt cost after tax?
$12.04
Leo bought a used car for x dollars. One year later the value of the car was 0.79x. Which expression is another way to describe the change in value of the car?
A) 0.21% decrease
B) 0.79% decrease
C) 21% decrease
D) 79% decrease
Answer Choice C: 21% decrease
1) Multiply the decimal by 100
2) Move the decimal point 2 places to the right.
A real estate agent receives a 3% commission for selling a house. What is the commission the agent received if they sold a house for 459,000?
$13,770
A group of friends went to lunch. The bill, before sales tax and tip, was $36.50. A sales tax of 8% was added. The group tipped 18% on the amount after the sales tax was added. What was the total amount the group paid, including tax and tip?
$46.42
The population of a city is expected to increase by 9.8% next year. If p represents the current population, which expression represents the expected population next year?
A) 1.98p
B) 1.098p
C) p + 0.098
D) 1 + 0.098
Answer Choice B: 1.098p
What are the 3 types of percent increases?
2) Gratuity(Tip)
3) Markup
In a department store, a $40 dress is marked "Save 15%". What is the sale price of the dress?
$34
Mrs. Aiello went to a salon and got a haircut and colored her hair for a total of $250. The sales tax is 5.6% and she tipped her hairdresser 20% before the sales tax. How much was Mrs. Aiello's total bill with tip and tax?
$314
Sally has a discount card that reduces the price of her grocery bill in a certain grocery store by 5%. If c represents the cost of Sally's groceries, which expression represents Sally's grocery bill?
A) 0.05c
B) 0.95c
C) c - 0.05
D) c + 0.95
Answer Choice B: 0.95c
What is the equation that is used to represent simple interest?
I = Prt
Mrs. Murphy went to get her car washed. The total cost of her service was$33.60. She decided to tip the servicemen, and her final total with tip was $43.68. What was the percent increase(tip) of the cost of her service?
30% increase
You put $500 in a savings account. The account earns 3% simple interest per year. What is the balance after 3 years?
$545
If an original price x, is discounted 40% off. Write the 2 expressions that represent the sale price.
x - 0.4x and 0.6x
What is the ratio that compares the change in quantity to the original amount?
Percent of Change
A bank offers a savings account with an annual interest rate of 2%. How long does it take an account with a principal of $800 to earn $100 in interest?
6.25 years
Ms. Pickford works at Gamestop in her spare time. She makes 300 per week. She earns an 8% commission for all sales. She sold $1500 in the month of November. What was the total amount Ms. Pickford made in November including her salary and commission?
$1320
The amount of money in a bank account increased by 21.5% over the last year. If the amount of the money at the beginning of the year is represented by n, which expression represents the amount of money in the bank account after the increase?
A) n + 0.215n
B) n + 21.5n
C) 0.125n
D) 21.5n