Percent and Percent of Change

Complete the review for your percent/interest test

CONVERT DECIMALS TO PERCENTS
NOTES 23 (inside)

Match

Match the following

• 50%

• 6.23%

• 125%

• 7.25%

• 8%

0.5

0.0623

1.25

0.0725

0.08

• 0.5

• 0.0623

• 1.25

• 0.0725

• 0.08

Multiple Choice

Select the equation that represents the given situation.

32% of 208 is what number?

• 32 x 208= n

• 208 = 32n

• 0.32 x 208 = n

• 208 = 0.32n

Multiple Select

To convert a percent to a decimal

• divide the percent by 100

• move the decimal twice to the left

• multiply the decimal by 100

• move the decimal twice to the right

Explanation Slide...

To convert from a percent to a decimal, remove the percent sign and move the decimal point 2 places to the left. (Note: insert extra "0's" as needed)

Multiple Choice

How would you change 6% to a decimal?

• Move the decimal 2 places to the right, and add 2 zeros behind the 6

  6% = 600

• Move the decimal 1 place to the right, and add a zero behind the 6

  6% = 60

• Move the decimal 2 places to the left, and add a zero in front of the 6

  6% = .06

• Move the decimal 1 place to the left

  6% = .6

PERCENT EQUATION
NOTES 23

Multiple Choice

What percent of 50 is 20?

• 40%
• 25%
• 2.5%
• 4%

Multiple Choice

64 is 40% of what number? 

• 160
• 104
• 25.6
• 108

Multiple Choice

Determine if you are finding the part, percent, or whole.  
18 is what percent of 36?

• Part
• Percent
• Whole

Multiple Choice

Determine if you are finding the part, percent, or whole.  
What is 20% of 60?

• Part
• Percent
• Whole

Multiple Choice

Determine if you are finding the part, percent, or whole.  
12 is 50% of what number?

• Part
• Percent
• Whole

Multiple Choice

The percent equation is ________

• whole = part x percent

• part = percent x whole

• part = percent / whole

Finding the PERCENT of CHANGE
Notes 24

Multiple Select

Which terms represent a percent of increase

• markup

• tax

• tip

• discount

• sale

Multiple Select

Which terms represent a percent of decrease

• markdown

• tax

• tip

• discount

• sale

Multiple Choice

Which is the correct proportion to find the percent of change?

• $$\frac{change}{original}=\frac{\%}{100}$$  

• $$\frac{change}{100}=\frac{\%}{original}$$  

• $$\frac{original}{\%}=\frac{100}{change}$$  

• $$\frac{\%}{change}=\frac{original}{100}$$  

• $$\frac{original}{change}=\frac{\%}{100}$$  

Multiple Choice

Discount is ____________ from the price.

• added
• divided
• subtracted
• Multiplied

Multiple Choice

Sales tax is __________ to the price

• subtracted
• added
• multiplied
• divided

Multiple Choice

Calculate the percent increase. Round to the nearest percent.

Original: 0.25

New: 0.41

• 64%

• 0.64%

• 39%

• 0.39%

Multiple Choice

Calculate the percent increase. Round to the nearest percent.

Original: 115

New: 161

• 40%

• 0.40%

• 29%

• 0.29%

Multiple Choice

A TV is regularly priced at $600, but it is on sale for 20% off. What's the sale price?

• $320
• $500
• $480
• $720

Multiple Choice

If the original quantity is 15 and the new quantity is 19, which is the best estimate for the percent change?

• 25% decrease

• 5% decrease

• 5% increase

• 25% increase

Markups and Discounts
Notes 24 (inside)

Multiple Choice

Write 8.25% as a decimal. 

• 0.0825
• 0.825
• 82.5
• 825

Multiple Choice

The marching band had 304 students last year. This year, 322 students participate in band. Does this scenario represent a percent increase or decrease?

• Percent increase

• Percent decrease

Match

Match the following steps to instructions.

What are the steps to find the Percent of Change?

• Step 1

• Step 3

• Step 4

• Step 5

Identify ORIGINAL and NEW amount

subtract new from the original to get the change

 divide the change by the original

 multiply the answer by 100 to get your percent change

• Identify ORIGINAL and NEW amount

• subtract new from the original to get the change

•  divide the change by the original

•  multiply the answer by 100 to get your percent change

Multiple Choice

What is the percent change going from 10 to 16.

• 60% increase

• 60% decrease

• 6% increase

• 66% increase

Multiple Choice

Sam bought an $85.00 jacket for 40% off of the regular price.  How much did he pay for the jacket? 

• 75
• 51
• 36
• 34

Multiple Choice

Your bill is $9.99. You leave a 10% tip. What is the final price of your meal?

• $10.98

• $0.99

• $5.88

Multiple Choice

What is the total cost with sales tax?
Price $17.95
Tax 6%

• $19.03
• $18.50
• $1.08
• $2.15

Multiple Choice

Yesterday, I ran 5 miles. Today, I ran 3.7 miles. Does this scenario represent a percent increase or percent decrease?

• Percent increase

• Percent decrease

Multiple Choice

Last year, 625 students attended Kener's school. This year, 590 students attend the school. Is the percent change an increase or decrease?

• Increase

• Decrease

• Neither an increase nor a decrease

Multiple Choice

What is the formula for simple interest?

• A=P(1+r)^t
• I=Prt
• I=P(1+r)t
• A=Prt

Simple INTEREST
NOTES 25

Multiple Choice

What does the P in I =PRT mean?

• Power

• Principal

• Product

• Percent

Multiple Choice

The Principal and Interest are always___________.

• fraction
• decimal
• percent
• money

Multiple Choice

Question #5

In the formula I=P·R·T, what does r stand for in a loan?

A. Rate: the interest percentage you will pay on a loan

B. Ratio: the size of the interest interval compared to time

C. Return: how much money you end up earning

D. Reserves: how much money you have in the investment

• A

• B

• C

• D

Multiple Choice

Principal = $800
Interest Rate = 3.5%
Time = 6 months
Find the interest earned.

• 14
• 140
• 168
• 16.80

Multiple Choice

I = $78

P = ?

r = 3.25%

t = 2 months

• $14,400

• $120

• $1440

• $152.10

Multiple Choice

P = $9800

r = 12.8%

t = 19 months

A = ?

• $1986.13

• $11,786.13

• $23,833.60

• $33,633.60

Multiple Choice

What is the interest rate of the loan for $45,000 for 25 years that costs you a total of $95,625 at the end of 25 years?

• 3 %

• 3.5 %

• 4%

• 4.5%

• 5%

Multiple Choice

I = $78

P = ?

r = 3.25%

t = 2 months

• $14,400

• $120

• $1440

• $152.10

Multiple Choice

Betty invested $1475 at a rate of 8% and earned $177 in interest. How long was her money invested?

• 1 year

• 18 months

• 2 years

• 15 years

• 15 months

Multiple Choice

Jude takes out a loan for $10,500 with a 7% interest rate for 36 months.

What is the equation to find his simple interest?

• I = 10,500 x 7 x 3

• I = 10,500 x 0.7 x 3

• I = 10,500 x 0.07 x 3

Math Response

Felipe invested in a savings bond for 6 years and was paid simple interest at an annual rate of 3%. The total interest that he earned was $540. How much did he invest?

Type answer here

Correct Answer: 3000

Deg^°

Rad

Math Response

Chris borrowed $8,000 from a lender that charged simple interest at an annual rate of 7%. When Chris paid off the loan, he paid $1,680 in interest. How long was the loan for, in years?

Type answer here

Correct Answer: 3

Deg^°

Rad