ISEE Middle Level Math : How to find percentage

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

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Example Questions

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Example Question #1 : Percentage

A watch originally cost $55.00. If it is on sale for 20% off, what is the sale price of the watch?

Possible Answers:

Correct answer:

Explanation:

To solve:

First, find what is 20% of 55 by multiplying:

Then, subtract 20% (11) from the original price:

The final sale price will be $44.00.

Example Question #2 : Percentage

Which is largest?

a. 30% of 150

b. 20% of 300

c. 40% of 60

d. 10% of 400

Possible Answers:

Correct answer:

Explanation:

To solve:

First find the corresponding percentage of each multiple choice answer,

a)

b)

c)

d)

Then, compare the amounts and select which amount is the largest:

b) 60

Example Question #3 : How To Find Percentage

How do you write  as a percent?

Possible Answers:

15%

20%

25%

50%

5%

Correct answer:

20%

Explanation:

 is equal to , which is 20%.

Example Question #3 : Percentage

Andrew has completed 80% of the race. If the race is 5000 meters, how far along is Andrew?

 

Possible Answers:

Correct answer:

Explanation:

Multiply the length of the race by the percentage accomplished by Andrew:

Answer: Andrew has completed 4000 meters of the race.

Example Question #4 : Percentage

Which is less?

 

a. 60% of 10

b. 20% of 40

c. 30% of 20

d. 10% of 50

Possible Answers:

Correct answer:

Explanation:

Find the amounts by multiplying each number to the percentage rate:

Compare the amounts to find the least. The answer is D.

 

Example Question #6 : How To Find Percentage

A round trip flight is on sale for $425.00. If the flight originally costs $500.00, what percentage was it reduced by?

Possible Answers:

Correct answer:

Explanation:

Subtract the sale price from the original price:

Divide that amount by the original price to find the percentage of the sale.

Answer: The flight was reduced by 15%.

Example Question #5 : Percentage

Anita is sewing a quilt made of 120 patches. She has sewn together 84 patches already. What percentage of the quilt has Anita sewn?

 

Possible Answers:

Correct answer:

Explanation:

Divide 84 by the entire amount of patches 120 to find the percentage completed.

 

The answer is Anita has completed 70% of the quilt.

Example Question #8 : How To Find Percentage

Phil filled up 25 balloons for a party. By the end of the night, only 15 balloons were left; the rest had popped. What percentage of balloons popped throughout the party?

 

Possible Answers:

Correct answer:

Explanation:

Subtract  to find the amount of balloons that popped.

Then, divide

The answer: 40% of the balloons popped.

Example Question #9 : How To Find Percentage

A pair of sneakers is on sale for 20% off the original price of $120.00. What is the sale price of the sneakers?

Possible Answers:

Correct answer:

Explanation:

First, multiply 120 by 0.20.

Subtract that amount from the original price:

 

Answer: The sneaker's sale price is $96.00

Example Question #10 : How To Find Percentage

Carolina needs to complete a 600-word essay for a test she is taking. If she has already written 445 words, what percentage of the essay has she completed? (Round to the nearest percent.)

Possible Answers:

Correct answer:

Explanation:

Divide the number of words completed by the number of words needed:

Answer: Carolina has completed 74% of the essay.

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