ISEE Middle Level Math : How to find percentage

Study concepts, example questions & explanations for ISEE Middle Level Math

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Example Questions

Example Question #21 : Percentage

What is ?

Possible Answers:

Correct answer:

Explanation:

First,subtract 7 from each side:

Then, divide each side by 7:

 

Example Question #22 : Percentage

Berta went shopping for a bathroom curtain. How much did she pay for the curtain if it was  off its original price of

Possible Answers:

Correct answer:

Explanation:

First, multiply .

Then, subtract that amount from the original price.

Answer: Berta paid  for the curtain.

Example Question #21 : How To Find Percentage

Oliver pays for a skateboard. What is the discount percentage he receives if the skateboard originally costs

Possible Answers:

Correct answer:

Explanation:

Divide .

Subtract that amount from  to find the discount percentage Oliver received:

Answer: Oliver received a  discount on the skateboard.

Example Question #21 : How To Find Percentage

A computer is on sale for  off its original price of  What is the sales price of the computer?

Possible Answers:

Correct answer:

Explanation:

First, multiply

 

Then, subtract that amount from the original price:

Answer: The sales price is

 

Example Question #25 : Percentage

A painting is 37% off of its original price of $200.00. What is the sale price of the painting?

Possible Answers:

Correct answer:

Explanation:

First, multiply:

The, subtract that amount from 200:

Example Question #26 : Percentage

A guitar is on sale for 15% off of its original price of $350.00. What is the sales price of the guitar?

Possible Answers:

Correct answer:

Explanation:

First, multiply:

Then, subtract that value from the original amount:

 

Example Question #22 : How To Find Percentage

85 is what percent of 400?

Possible Answers:

Correct answer:

Explanation:

Set up the proportion statement, where  is our answer, and solve:

Example Question #21 : How To Find Percentage

In a class of 120 students, 108 of them decide to attend a field trip. What percent of the students do not attend the field trip?

Possible Answers:

10%

12%

90%

88%

Correct answer:

10%

Explanation:

If 108 students attend the field trip, 12 students do not.

To find the percent of students not attending the field trip, divide the number of students not attending by the total number of students, and then multiply that result by 100%.

Example Question #29 : Percentage

Below is the list of candidates for Student Council president, along with the number of votes each won:

What percent of the students voted for neither Kerry nor Quinn (nearest tenth)?

Possible Answers:

Correct answer:

Explanation:

 students total voted. Out of those,  voted for a candidate other than Kerry or Quinn.  To convert this to a percent, use this proportion and solve for  :

 

Example Question #30 : Percentage

A $200.00 cell phone is on sale for 15% off. What is the sales price of the cell phone?

Possible Answers:

Correct answer:

Explanation:

First multiply:

Then, subtract that amount from the original price:

Answer: The cell phone costs $170.00.

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