6.3: The Percent Proportion

 

Solve each percent proportion. Use a ratio table to check your answer.

  1. What number is 20% of 60?

  2. 35 is what percent of 70?

  3. 51 is 102% of what number?

  4. What number is 80% of 130?

  5. 72 is what percent of 100?

  6. 44 is 55% of what number?

 

TRY:

Write and solve a proportion to answer the question.

  1. 0.2 is what percent of 16?

  2. 19.6 is 24.5% of what number?

  3.  is 30% of what number?

  4. What number is 45% of

  5. You are making 28 name badges for a committee. You complete 75% of these on Monday. How many do you have left to complete on Tuesday?

  6. You and your friend are selling tickets for the orchestra concert. On Thursday, you sold 15 tickets and your friend sold 10 tickets.

     a. What percent of the tickets sold on Thursday did you sell?

     b. On Friday, you sold 9 tickets and your friend sold 16 tickets. What percent of the tickets sold on Friday did you sell?

     c. What percent of the total tickets sold on Thursday and Friday did
you sell?

 

6.4: Percent Equation

 

Explain to a partner how to use the percent proportion to determine the number of
points you need to get a score of 80% on
a 45-point test.

 

Answer the question. Explain the method you chose.

 

1.   24 is what percent of 60?

 

  2. 8 is 40% of what number?

 

Write and solve an equation to answer the question.

 

  3. What number is 70% of 120?    

 

4. 30 is what percent of 120?

 

  5. 112 is 56% of what number?     

 

6. 128 is what percent of 80?

 

  7. What number is 140% of 45?    

 

8. 15 is 6% of what number?

 

  9. There are 35 competitors in a marathon. Sixty percent of these finished the race in under four hours. How many competitors finished the race in under four hours?

 

10. Your class is going on a field trip. Twenty-four students have turned in their permission slips so far. This is 80% of the students in the class. How many students are in the class?

 

11. You take a test with 32 questions on it. You answer 24 questions correctly. What percent of the questions do you answer correctly?

 

12. You have r rare coins, consisting of p pennies and n nickels.

     a. p is 20% of 190. How many pennies do you have?

     b. 190 is 200% of r.  How many rare coins do you have?

     c. n is 60% of r. How many nickels do you have?

 

 

 

 

 

 

 

 

 

 

 

 

	Item Price top p earrings $  3.00 T socks $  2.00 granola bar $  0.50 T Subtotal $13.00 Tax $  0.21 Total $13.21

 

 

 

 

 

 

13. The table shows the sales receipt for your purchase.

     a. The items with a “T” next to the price are subject to
sales tax. What percent sales tax did you pay?

     b. Calculate the price of the top.

     c. The price you paid for the top was 60% of the original
price. What was the original price of the top?

 

 

 

 

 

Tell whether the following statement is true or false.

Explain your reasoning.

14. 120% of a whole number is always greater than the number.

15. You can find 0.5% of a number by multiplying the number by