Unit Rates and Percentages

This video tutorial covers Unit 3 Lesson 10 on percentages. It explains how to calculate percentages using different coin combinations, historical coin values, and a double number line. The tutorial also includes practical examples such as calculating token costs, snail travel rates, and taco costs, emphasizing the concept of unit rates.

What percentage of a dollar is represented by four dimes?

• 30%

• 40%

• 20%

• 10%

Which combination of coins equals 30% of a dollar?

• Three nickels

• Two dimes

• Four pennies

• One quarter and one nickel

How much is a two and a half dollar coin worth as a percentage of one dollar?

• 150%

• 200%

• 250%

• 300%

What is the percentage equivalent of $25 on a double number line representing $50?

• 100%

• 75%

• 50%

• 25%

If Elena buys 8 tokens for $4.40, how many tokens can she buy for $6.05?

• 13

• 12

• 11

• 10

What is the cost of 19 tokens if each token costs $0.55?

• $10.45

• $9.45

• $11.45

• $12.45

How long will it take a snail to travel 24 centimeters if it travels 10 centimeters in 4 minutes?

• 8 minutes

• 9.6 minutes

• 10 minutes

• 12 minutes

How far does the snail travel in 6 minutes if it travels 10 centimeters in 4 minutes?

• 12 cm

• 20 cm

• 15 cm

• 18 cm

What is the unit rate for the cost of tacos if 3 tacos cost $18?

• $4

• $5

• $7

• $6

If you buy t number of tacos for c amount of dollars, what is the formula for the unit rate?

• t*c

• c+t

• t/c

• c/t