HSPT Math : Percentages

Study concepts, example questions & explanations for HSPT Math

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Example Questions

Example Question #581 : Concepts

What is  of ?

Possible Answers:

Correct answer:

Explanation:

One way to figure out what number is a percentage of a larger number is to convert the percent into a decimal and multiply it by the whole number. Since  is equal to , multiply this by .

 is your answer.

 

Example Question #1 : How To Find The Whole From The Part With Percentage

 of what number is ?

Possible Answers:

Correct answer:

Explanation:

Taking  of a number is the same as multiplying that number by . We can find our number, therefore, by dividing  by :

Example Question #13 : Percentage

What is  of ?

Possible Answers:

Correct answer:

Explanation:

Rewrite  as a decimal by writing  with a decimal point, then shifting it two spaces left:

Multiply this by :

Example Question #581 : Concepts

Convert  into a decimal.

Possible Answers:

Correct answer:

Explanation:

In order to convert from a percentage to a decimal, simply remove the percentage and move the decimal place back two spaces or divide by 100.

The decimal conversion is:  

Example Question #164 : Grade 7

What number increased by 25% is equal to 7?

Possible Answers:

Correct answer:

Explanation:

To increase a number by 25% is to take

 of the number, or, equivalently, multiply it by

.

Therefore, we divide 7 by :

, so

.

Example Question #165 : Grade 7

What number decreased by 25% is equal to 7?

Possible Answers:

Correct answer:

Explanation:

To decrease a number by 25% is to take

 of the number, or, equivalently, multiply it by

.

Therefore, we divide 7 by :

, so

.

Example Question #1184 : Hspt Mathematics

What is  increased by 30%?

Possible Answers:

Correct answer:

Explanation:

Increasing a number by 30% is equivalent to taking 130% of a number, which in turn is equivalent to multiplying it by 

 increased by 30% is the product of  and :

, so this quantity is equal to , the correct answer.

Example Question #591 : Arithmetic

What is  decreased by 40%?

Possible Answers:

Correct answer:

Explanation:

Decreasing a number by 40% is equivalent to taking 60% of a number, which in turn is equivalent to multiplying it by 

 decreased by 40% is the product of  and :

, so the correct response is .

Example Question #1181 : Hspt Mathematics

6 decreased by what percent is  ?

Select the closest answer.

Possible Answers:

Correct answer:

Explanation:

The difference of 6 and  is 

.

Therefore, 6 is being decreased by ; to find out what percent this is of 6, we calculate:

, so

.

The answer that comes closest among the four choices is 20%.

Example Question #591 : Concepts

12 increased by what percent is  ?

Select the closest answer.

Possible Answers:

Correct answer:

Explanation:

The difference of  and 12 is

.

This represents an increase of 

, so this is .

Tthe response closest to the correct percent is 30%.

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