Rates, Proportions, and Percentages

In this video, Steve reviews proportional relationships, focusing on rates, unit rates, and proportions. He explains how to solve proportions using methods like cross-multiplication. The video also covers percent vocabulary, including markup, discount, commission, and interest, and how to calculate percent change. Finally, Steve discusses measurement conversions using proportions. The video concludes with an invitation to reach out for further assistance.

What is a unit rate?

• A ratio with two different units

• A ratio with equal quantities

• A ratio with a quantity of one

• A ratio with no units

Which of the following is an example of a rate?

• 5 apples

• 10 miles per hour

• 3 liters

• 7 days

What is the method that always works for solving proportions?

• Guess and check

• Use a scale factor

• Simplify and scale up

• Cross multiply and divide

If 432 miles can be traveled in 6 hours, how many miles can be traveled in 8 hours?

• 576 miles

• 500 miles

• 600 miles

• 550 miles

Which term is associated with an increase in price?

• Markdown

• Wholesale

• Markup

• Discount

What is a commission?

• A decrease in price

• An amount received in addition to wages

• A type of interest

• A form of tax

How is percent change calculated?

• Percent over 100 equals part over whole

• Percent over 100 equals total over part

• Percent over 100 equals original over change

• Percent over 100 equals change over original

What is the formula for percent proportion?

• Percent over 100 equals part over total

• Percent over 100 equals whole over part

• Whole over part equals percent over 100

• Part over whole equals percent over 100

What is the conversion factor from inches to centimeters?

• 1 inch equals 2.54 centimeters

• 1 inch equals 3.14 centimeters

• 1 inch equals 1.54 centimeters

• 1 inch equals 2.34 centimeters

How many centimeters are in 5 inches?

• 12.0 centimeters

• 10.7 centimeters

• 12.7 centimeters

• 14.7 centimeters