Activities

1. 30 is 25% of what number?

2. 30% of what number is 270?

3. What is 12% of 85?

4. On a recent science quiz you scored 75%.  If there was a total of 20 questions on the test how many did you get correct?  Show your work.

5. A bakery sells the day old baked goods at a discount of 40% off.  If the bagels regularly cost $1.50, how much would you save if you bought it when it is a day old?  Show your work.

6. Compare using <, > or =.  Show your work.
   15% of 60         25% of 40 

7. A department store is having a sale.  All clothing items are 30% off.  Fill in the chart below finding the amount saved and the sale price of each item. Show your work.
   
   
   
   
8. Your family is planning a family vacation and is trying to find the best deal on hotel prices.  The Happy Family hotel charges $99.00 per night for a room but has a special that gives you 15% off your room.  The Merry Place hotel charges $124.00 per night for a room but they have a special for 30% off your room.  Which hotel is a better value for your family to stay in?  Justify your answer.

Answer Key/Rubric

1. 120

2. 900

3. 10.2
   
   
4. You got 15 questions correct.

        Work might include, but is not limited to:

• 
• To solve the missing part of the equation you have to find the relation between 100 and 20.  100 ÷ 5= 20.  So you must perform the same operation to the numerators to find the missing value.
• 75÷5 = 15
• The student scored

5. You would save $0.60.

        Work might include, but is not limited to:

• Change 40% to a decimal. 40% = 0.40
• Multiply the original price by 0.40.  $1.50 * 0.40 = $0.60

6. 15% of 60 25% of 40

        Work might include, but is not limited to:

• Find the value of each expression and compare.
• Change 15% to 0.15
• Multiply 60 * 0.15 = 9
• Change 25% to 0.25
• Multiply 40 * 0.25 = 10
• 9 < 10

7. 
   
   

   The work of each item might include, but is not limited to:

• Changing the discount of 30% to 0.30 for each one
• Multiplying the original price buy the discount; this will be the amount saved

• 50 * 0.30 = 15
• 120 * 0.30 = 36
• 75 * 0.30 = 22.5

• To find the sale price you have to subtract the amount saved from the original price.

• 50 – 15 = 35
• 120 – 36 = 84
• 75 – 22.5 = 52.5

8. The Happy Family Hotel is cheaper per night.

        Work might include, but is not limited to (two different methods are shown below):

• Find the price of each hotel and compare
• Happy family discount is 15% which means you are paying 85%.  100 – 15 = 85
• Change 85% to 0.85
• Multiply $99.00 * 0.85 = $84.15.  That is the amount that you will pay per night.
• For the Merry Place Hotel change 30% = 0.30
• Multiply the price by the decimal $124.00 * 0.30 = $37.20.  That is the amount of money that you would save.
• Subtract the discount from the original price $124.00 – 37.20 = $86.80
• Compare the price and you will see that $84.15 < $86.80