# Lesson 10

What Are Percentages?

### Problem 1

What percentage of a dollar is the value of each coin combination?

1. 4 dimes
2. 1 nickel and 3 pennies
3. 5 quarters and 1 dime

### Problem 2

1. List three different combinations of coins, each with a value of 30% of a dollar.

2. List two different combinations of coins, each with a value of 140% of a dollar.

### Problem 3

The United States government used to make coins of many different values. For each coin, state its worth as a percentage of $1. $$\frac12$$ cent 3 cents 20 cents$$$2 \frac12$$

### Problem 5

Elena bought 8 tokens for $4.40. At this rate: 1. How many tokens could she buy with$6.05?
2. How much do 19 tokens cost?
(From Unit 3, Lesson 9.)

### Problem 6

A snail travels 10 cm in 4 minutes. At this rate:

1. How long will it take the snail to travel 24 cm?
2. How far does the snail travel in 6 minutes?
(From Unit 3, Lesson 8.)

### Problem 7

1. 3 tacos cost \\$18. Complete the table to show the cost of 4, 5, and 6 tacos at the same rate.

number of tacos cost in dollars rate in dollars per taco
3 18
4
5
6
2. If you buy $$t$$ tacos for $$c$$ dollars, what is the unit rate?
(From Unit 3, Lesson 7.)