Lesson 08: Percent Increase and Decrease with Equations | Unit 4: Proportional Relationships and Percentages

Multiple Choice

A pair of designer sneakers was purchased for $120. Since they were purchased, their price has increased by 15%. What is the new price?

• $138

• $150

• $135

• $140

Multiple Choice

Elena’s aunt bought her a $150 savings bond when she was born. When Elena is 20 years old, the bond will have earned 105% in interest. How much will the bond be worth when Elena is 20 years old?

• $307.50
• $300.00
• $175.00
• $250.00

Multiple Select

In a video game, Clare scored 50% more points than Tyler. If $$c$$ is the number of points that Clare scored and $$t$$ is the number of points that Tyler scored, which equations are correct? Select **all** that apply.

• $$c = 1.5t$$

• $$c = t + 0.5$$

• $$c = t + 0.5t$$

• $$c = t + 50$$

• $$c = (1 + 0.5)t$$

Multiple Choice

On Monday, the high was 60 degrees Fahrenheit. On Tuesday, the high was 18% more. How much did the high increase from Monday to Tuesday?

• 5 degrees
• 10.8 degrees
• 15 degrees
• 12 degrees

Multiple Select

Last week, the price, in dollars, of a gallon of gasoline was $$g$$ . This week, the price of gasoline per gallon increased by 5%. Which expressions represent this week’s price, in dollars, of a gallon of gasoline? Select **all** that apply.

• $$g + 0.05$$

• $$g + 0.05g$$

• $$1.05g$$

• $$0.05g$$

• $$(1+0.05)g$$

Multiple Select

Last week, it rained $$g$$ inches. This week, the amount of rain decreased by 5%. Which expressions represent the amount of rain that fell this week? Select **all** that apply.

• $$g - 0.05$$

• $$g - 0.05g$$

• $$0.95g$$

• $$0.05g$$

• $$(1-0.05)g$$

Multiple Choice

If you deposit $300 in an account with a 6% interest rate, how much will be in your account after 1 year?

• $318

• $300

• $306

• $330

Multiple Choice

If you leave this money in the account, how much will be in your account after 2 years?

• The amount will double in 2 years.
• You will lose 10% of the initial amount.
• Amount depends on initial principal and interest rate.
• The account will have a fixed amount of $1000.

Multiple Choice

Two months ago, the price, in dollars, of a cell phone was $$c$$ . Last month, the price of the phone increased by 10%. Write an expression for the price of the phone last month.

• c
• 0.9c
• 1.10c
• 11c

Multiple Choice

Two months ago, the price, in dollars, of a cell phone was $$c$$ . This month, the price of the phone decreased by 10%. Write an expression for the price of the phone this month.

• 0.9 * c
• c + 10%
• 1.1 * c
• c - 0.1 * c