ISEE Middle Level Math : How to find the part from the whole with percentage

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

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Example Questions

Example Question #21 : How To Find The Part From The Whole With Percentage

Solve for .

Possible Answers:

Correct answer:

Explanation:

Use a proportion to solve the problem.

Cross multiply

Example Question #17 : Percentages

To get on the ballot for student body president, a student must turn in a petition with the signatures of 4% of the students. If there are 3,268 students, how many signatures must a student get to be on that ballot? (Round to the nearest whole person.)

Possible Answers:

Correct answer:

Explanation:

4% of 3,268 can be calculated by multiplying 3,268 by 0.04, the decimal equivalent of 4%:

Multiply 3,268 by 4, then move the decimal point two places to the right:

,

so

Rounded to the nearest whole number -  131 signatures.

Example Question #22 : How To Find The Part From The Whole With Percentage

Sally painted 11 pictures on Monday, 7 pictures on Wednesday, and 3 pictures on Friday. On average, how many pictures did Sally paint on those 3 days?

Possible Answers:

Correct answer:

Explanation:

To solve, first find the total number of pictures painted:

Then, divide the total number of pictures by the total number of days to find the average.

Sally painted an average of 7 pictures per day.

Example Question #3 : Use Proportional Relationships To Solve Multistep Ratio And Percent Problems: Ccss.Math.Content.7.Rp.A.3

200 percent of what number is equal to the difference between 75 and 25?

Possible Answers:

Correct answer:

Explanation:

We must first start by finding the difference between and :

Next find the decimal equivalent of %, which is done by dividing by :

Now we divide by .

Our final answer is , because when it is multiplied by %, it equals the difference between and .

Example Question #23 : How To Find The Part From The Whole With Percentage

Solve:

Possible Answers:

Correct answer:

Explanation:

Example Question #1 : Use Proportional Relationships To Solve Multistep Ratio And Percent Problems: Ccss.Math.Content.7.Rp.A.3

What is the sale price of a game if it is % off the original price of ?

Possible Answers:

Correct answer:

Explanation:

First, multiply:

Then subtract that amount from the original price:

Answer: The sale price is .

Example Question #4 : Use Proportional Relationships To Solve Multistep Ratio And Percent Problems: Ccss.Math.Content.7.Rp.A.3

What is the sale price of a carton of milk if it is % off the original price of ?

Possible Answers:

Correct answer:

Explanation:

First, multiply:

Then subtract that amount from the original price:

Answer: The sale price is .

Example Question #3 : Use Proportional Relationships To Solve Multistep Ratio And Percent Problems: Ccss.Math.Content.7.Rp.A.3

What is the sale price of a pair of shoes if it is % off the original price of ?

 

Possible Answers:

Correct answer:

Explanation:

First, multiply:

Then subtract that amount from the original price:

Answer: The sale price is .

Example Question #24 : How To Find The Part From The Whole With Percentage

Find the equivalent of %.

Possible Answers:

Correct answer:

Explanation:

Divide:

Answer:

Example Question #25 : How To Find The Part From The Whole With Percentage

Find the equivalent of %.

Possible Answers:

Correct answer:

Explanation:

Divide:

Answer: 

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