Unit 5 Study Guide

1. Lilly deposits 25% of her $230 paycheck into her savings account each Friday. Write two equations that can be used to calculate how much money Lilly saves each week.

• 25*100

• 25(100)=x(230)

• .25(230)

• x(100)=230(25)

Select the unknown value that makes this statement true.

20% of __________ is 180.

• 1800

• 900

• 200

• 100

Look at the number line above.

What percent would be located at point C?_______________________

• 125%

• 150%

• 100%

• 50%

The local ice cream shop surveyed their customers to see which flavor of ice cream is most popular. 200 people choose chocolate as their favorite flavor, which represents 25% of the customers surveyed. How many total customers were surveyed?

• 200

• 250

• 850

• 800

Bailey gave a $2.50 tip to her waiter for good service.  If her food bill was $10.00, how could she use proportions to find p, the percent of tip she left for her waiter?  Write the percent proportion.

•  $\frac{10}{2.5}=\ \frac{P}{100}$  

•  $\frac{2.5}{10}=\ \frac{P}{100}$  

•  $\frac{100}{10}=\ \frac{2.5}{P}$  

•  $\frac{P}{10}=\ \frac{2.5}{100}$  

Rico travelled 282 miles which is 47% of the total distance to his friend’s house. How far does he live from his friend’s house?

• 47

• 329

• 282

• 600

According to the weather station, it rained 35% of the last 20 days. How many days did it rain?

• 7

• 14

• 5

• 10

Carlos spelled 36 out of 50 words correctly on his spelling test. What was his percentage of correct words spelled?

• 36%

• 22%

• 72%

• 50%

Mrs. Morton asked her students to place the points below on a number line.

P: -.75 Q: 175% R: 0.5 S: -1.4 T: -.4

Which of the following number lines below is labeled correctly?

• 
• 
• 
• 

Miss Raney asked three students to show how they could find the answer to the following question.

What is 40% of 145?

The students’ responses are shown below:

Jacqueline wrote an equation: 145(0.40) = x

Giovanni wrote a proportion: 40100=x145

Susan used mental math: Find 10% of 145, then multiply that amount by 4.

Which student(s) showed a correct way to find 40% of 145?

• Jacqueline, Giovanni, Susan

• Only Giovanni

• Jacqueline and Susan

• Only Susan