HSPT Math : HSPT Mathematics

Study concepts, example questions & explanations for HSPT Math

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Example Questions

Example Question #583 : 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 #4 : Use Proportional Relationships To Solve Multistep Ratio And Percent Problems: Ccss.Math.Content.7.Rp.A.3

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

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 #583 : Concepts

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 : Concepts

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 #63 : Percentages

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%.

Example Question #591 : Arithmetic

 is 40% of 150.

 is 30% of 200.

 is 20% of 225.

Which are equal to each other/one another?

Possible Answers:

 and 

 and 

No two of , and  are equal.

 and 

Correct answer:

 and 

Explanation:

 is 40% of 150, which is

 is 30% of 200, which is 

 is 20% of 225, which is 

The correct response is .

Example Question #11 : Use Proportional Relationships To Solve Multistep Ratio And Percent Problems: Ccss.Math.Content.7.Rp.A.3

What is the percentage of male students in a class if  are male out of  students?

Possible Answers:

Correct answer:

Explanation:

First you want to make a proportion so  of the class are male.  

You can reduce this fraction by  since both the numerator and denominator are divisible by it.  

This gives you  which as a decimal is .  

To make that into a percentage, you multiple by  and add a "%" symbol.  

So that gives you .

Example Question #591 : Concepts

 is 85% of .

What percent  must be increased by to obtain ?

(Choose the closest answer)

Possible Answers:

Correct answer:

Explanation:

The reasoning is independent of the value of , so assume that 

 is 85% of , so .

To find out by what percent  must be increased by to obtain , calculate

This is

 

The correct choice is 18%.

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