Unit 4, Proportional Relationships and Percentages

Front

What is a proportional relationship?

Back

A proportional relationship is a relationship between two quantities where the ratio of one quantity to the other quantity is constant.

Front

How do you calculate the final price of an item including sales tax?

Back

Final Price = Original Price + (Original Price × Sales Tax Rate).

Front

Convert 55% to a fraction.

Back

11/20.

Front

What is the decimal equivalent of 4%?

Back

.04.

Front

How do you calculate sales tax on a purchase?

Back

Sales Tax = Original Price × Sales Tax Rate.

Front

If a bill is $27.31, how much is a 23% tip?

Back

$6.28.

Front

What is the formula to convert a percentage to a decimal?

Back

Divide the percentage by 100.

Front

What does it mean to express a percentage as a fraction?

Back

It means to write the percentage as a ratio of two integers, where the percentage is the numerator and 100 is the denominator.

Front

How do you find the percentage of a number?

Back

Percentage of a number = (Percentage Rate × Number) / 100.

Front

What is the sales tax rate in the example of Mr. Wilson's groceries?

Back

4.5%.