HSPT Math : Arithmetic

Study concepts, example questions & explanations for HSPT Math

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Example Questions

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 #64 : Percentages

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%.

Example Question #71 : Percentages

 is one-third of , which is four-fifths of . What percent of  is  ?

Possible Answers:

Correct answer:

Explanation:

 is four-fifths of , so .

 is one-third of , so 

 is  of ; the percent equivalent is that  is

of 

Example Question #74 : Percentages

 is three-fourths of  and three-fifths of . What percent of  is  ?

Possible Answers:

Correct answer:

Explanation:

For simplicity's sake, we will set ; this reasoning is independent of the value of .

 is three-fourths of  - that is, 

.

Since  is also three-fifths of ,

To find what percent  is of , calculate:

Example Question #592 : Arithmetic

What is  % of 60?

Possible Answers:

Correct answer:

Explanation:

  % of 60 can be calculated as follows:

Example Question #593 : Arithmetic

 is what percent of  ?

Round to the nearest whole percent.

Possible Answers:

Correct answer:

Explanation:

To calculate what percent  is of , evaluate:

The closest answer is 93%.

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