Lesson 10
What Are Percentages?
Let’s learn about percentages.
Problem 1
What percentage of a dollar is the value of each coin combination?
 4 dimes
 1 nickel and 3 pennies
 5 quarters and 1 dime
Problem 2

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

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
$\(2 \frac12\)
$5
Problem 4
Complete the double number to line show percentages of $50.
Problem 5
Elena bought 8 tokens for $4.40. At this rate:
 How many tokens could she buy with $6.05?
 How much do 19 tokens cost?
Problem 6
A snail travels 10 cm in 4 minutes. At this rate:
 How long will it take the snail to travel 24 cm?
 How far does the snail travel in 6 minutes?
Problem 7

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  If you buy \(t\) tacos for \(c\) dollars, what is the unit rate?