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Additional Activities Solve the following problems. Show your solutions. Write the answer on your worksheet or activity notebook.

1. Find the percent of 7 out of 10 scores.

2. 8 is what percent of 20?

3. 750 is 25% of what number?

4. 12 is what percent of 20?

5. Nilda saved Php450 from her allowance but spent Php150 on a school project. What percent of her savings did she spend?

6. Ronald spent Php75 during the first day of class. This was 40% of his weekly allowance. How much was his allowance?

7. Rommel played table tennis and won 13 out of 20 games. What percent of the games did he lose?

8. There are 12 girls in Ms. Spencer's class. The girls represent 40% of the entire class. How many students are there in the class?

9. Emily missed 11 questions in a test of 65 questions, what percent of the questions did she miss?


10. Tomas saved Php3 500 on his enrolment. He spent Php1 250 on miscellaneous expenses. What percent did he spend on miscellaneous expenses?​

Sagot :

Percentage, Rate, Base

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Percentage = Rate × Base

Rate = Percentage / Base

Base = Percentage / Rate

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Additional Activities: Solve the following problems. Show your solutions. Write the answer on your worksheet or activity notebook.

1. Find the percent of 7 out of 10 scores.

ANSWER: 70%

SOLUTION:

  • Rate = Percentage / Base
  • Rate = 7 / 10
  • Rate = 0.7 = 70%

2. 8 is what percent of 20?

ANSWER: 40%

SOLUTION:

  • Rate = Percentage / Base
  • Rate = 8 / 20
  • Rate = 0.4 = 40%

3. 750 is 25% of what number?

ANSWER: 3000

SOLUTION:

  • Base = Percentage / Rate
  • Base = 750 / 0.25 (25% —> 0.25)
  • Base = 3000

4. 12 is what percent of 20?

ANSWER: 60%

SOLUTION:

  • Rate = Percentage / Base
  • Rate = 12 / 20
  • Rate = 0.6 = 60%

5. Nilda saved Php450 from her allowance but spent Php150 on a school project. What percent of her savings did she spend?

ANSWER: 33%

SOLUTION:

  • Rate = Percentage / Base
  • Rate = 150 / 450
  • Rate ≈ 0.33 = 33%

6. Ronald spent Php75 during the first day of class. This was 40% of his weekly allowance. How much was his allowance?

ANSWER: Php 187.50

SOLUTION:

  • Base = Percentage / Rate
  • Base = 75 / 0.4
  • Base = 187.5

7. Rommel played table tennis and won 13 out of 20 games. What percent of the games did he lose?

ANSWER: 35%

SOLUTION:

  • (He won 13 out of 20, so he lost at 7 games)
  • Rate = Percentage / Base
  • Rate = 7 / 20
  • Rate = 0.35 = 35%

8. There are 12 girls in Ms. Spencer's class. The girls represent 40% of the entire class. How many students are there in the class?

ANSWER: 30 students

SOLUTION:

  • Base = Percentage / Rate
  • Base = 12 / 0.4
  • Base = 30

9. Emily missed 11 questions in a test of 65 questions, what percent of the questions did she miss?

ANSWER: 17%

SOLUTION:

  • Rate = Percentage / Base
  • Rate = 11 / 65
  • Rate ≈ 0.17 = 17%

10. Tomas saved Php3 500 on his enrolment. He spent Php1 250 on miscellaneous expenses. What percent did he spend on miscellaneous expenses?

ANSWER: 36%

SOLUTION:

  • Rate = Percentage / Base
  • Rate = 1250 / 3500
  • Rate ≈ 0.36 = 36%

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