(7) Unit 2 Study Guide & Practice Test

Lesson 1: Percent of a Number
Lesson 2: Proportions
Lesson 3: The Percent Proportion
Lesson 4: The Percent Equation (Triangle)
Lesson 5: Percent of Change
Lesson 6: Tax, Tips, Markup, & Discount
Lesson 8: Simple Interest

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Unit 2 Study Guide & Practice Test

Lesson 1: Percent of a Number

Things to know...
1.) change the percent to a decimal
2.) OF means MULTIPLY

Example:
25% of 30
.25 x 30
7.5

Fill in the Blank

Find 8% of 50

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Find 95% of 40

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Find 110% of 70

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Find 23.5% of 128

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Lesson 2: Proportions

Cross Multiply and Divide

If you have a word problem...
Set up a pattern and stick with it!!

Fill in the Blank

$$\frac{9}{x}=\frac{67}{100}$$

Round to the nearest tenth.

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Fill in the Blank

Jasmine bought 32 kiwi fruit for $16. How many kiwi fruit can Lisa buy if she has $4?

Lesson 3: The % Proportion

Fill in the Blank

What percent of $90 is $9?

%

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What number is 2% of 35?

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62 is 90.5% of what number? Round to the nearest tenth.

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Lesson 4: The Percent Equation

is = % x of

​Is

% of

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What number is 88% of 300?

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24 is what percent of 120?

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3 is 12% of what number?

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A local bakery sold 60 loaves of bread in one day. If 65% of these were sold in the afternoon, how many loaves were sold in the afternoon?

Fill in the Blank

The average adult male Western Lowland Gorilla eats about 33.5 pounds of fruit each day which is 67% of the Gorilla's diet. How much food does the average adult male gorilla eat each day?

Lesson 5: Percent of Change

​Amount of Change (Big # - Small #)
Original Amount (1st Number you see)

Multiple Choice

Find the percent of change. Round to the nearest whole percent if necessary.

30 inches to 24 inches

• 20% Increase

• 20% Decrease

• 25% Increase

• 25% Decrease

Multiple Choice

Find the percent of change. Round to the nearest whole percent if necessary.

$126 to $150

• 19% increase

• 19% decrease

• 16% increase

• 16% decrease

Lesson 6: Tax, Tip, & Markup

1. change the % to a decimal

2. multiply by the amount

3. ADD to the cost

Fill in the Blank

Find the total cost.

Notebook costs: $2.95

Tax: 5%

$

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Fill in the Blank

Find the total cost.

Lunch: $28

Tip: 15%

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Jaimi went to have a manicure that cost $30. She wanted to tip the technician 20% and tax is 5.75%. How much did she spend total for the manicure?

$

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Lesson 7: Discount

1. Change the percent to a decimal

2. multiply by the cost

3. SUBTRACT to find the new price

Fill in the Blank

Find the price of a $64 jacket with a discount of 20%

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$1,200 TV is on sale at 10% off. What is the new cost of the TV?

Multiple Choice

Mary and Roberto bought identical backpacks at different stores. Mary's backpack originally cost $65 and was discounted 25%. Roberto's backpack originally cost $75 and was on sale for 30% off. Who had the better buy?

• Mary

• Roberto

​Lesson 8: Simple Interest

I= interest
p= principle
r= rate (% as a decimal)
t= time (in years)

Fill in the Blank

Find the simple interest of

$640, 3%, 2 years

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Find the simple interest of

$580, 2%, 6 months

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The Masters family financed a computer that cost $1200. If the interest rate is 19%, how much will the family owe for the computer after one month if no payments are made?

$

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