Ratios, Proportions & Percents Flashcard

Front

What is a ratio?

Back

A ratio is a comparison of two quantities expressed as a fraction, indicating how many times one value contains or is contained within the other.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal. It can be used to solve for an unknown value.

Tags

CCSS.7.RP.A.2A

Front

How do you calculate a percentage of a number?

Back

To calculate a percentage of a number, multiply the number by the percentage (as a decimal). For example, 25% of 120 is 120 * 0.25 = 30.

Tags

CCSS.6.RP.A.3C

Front

What is the formula to find the sale price after a discount?

Back

Sale Price = Original Price - (Original Price * Discount Percentage).

Tags

CCSS.6.RP.A.3C

Front

How do you calculate sales tax?

Back

Sales Tax = Price of Item * Sales Tax Rate. Add the sales tax to the original price to find the total cost.

Tags

CCSS.7.RP.A.3

Front

What is a commission?

Back

A commission is a fee paid to an employee based on the sales they generate, usually expressed as a percentage of the sales amount.

Tags

CCSS.6.RP.A.3C

Front

How do you calculate a tip?

Back

Tip = Total Bill Amount * Tip Percentage. For example, a 20% tip on a $44.20 bill is 44.20 * 0.20 = 8.84.

Tags

CCSS.6.RP.A.3C

Front

What is the relationship between the number of people in line and waiting time?

Back

As the number of people in line increases, the waiting time typically increases, assuming a constant rate of service.

Tags

CCSS.5.OA.B.3

Front

How do you convert a percentage to a decimal?

Back

To convert a percentage to a decimal, divide the percentage by 100. For example, 17% becomes 0.17.

Front

What is the total cost of an item including tax?

Back

Total Cost = Price of Item + Sales Tax. For example, for a $10.50 item with a 7% tax, Total Cost = 10.50 + (10.50 * 0.07) = 11.24.

Tags

CCSS.6.RP.A.3C