HSPT Math : Concepts

Study concepts, example questions & explanations for HSPT Math

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Example Questions

Example Question #141 : Concepts

A guitar is on sale for 15% off of its original price of $350.00. What is the sales price of the guitar?

Possible Answers:

\displaystyle 365.00

\displaystyle 335.00

\displaystyle 297.50

\displaystyle 52.50

Correct answer:

\displaystyle 297.50

Explanation:

First, multiply:

\displaystyle 350.00*.15=52.50

Then, subtract that value from the original amount:

\displaystyle 350.00-52.50=297.50

 

Example Question #27 : How To Find Percentage

85 is what percent of 400?

Possible Answers:

\displaystyle 22 \frac{1}{2} \%

\displaystyle 21 \frac{1 }{4} \%

\displaystyle 19\frac{1}{2} \%

\displaystyle 27\frac{1}{2} \%

\displaystyle 23 \frac{3}{4} \%

Correct answer:

\displaystyle 21 \frac{1 }{4} \%

Explanation:

Set up the proportion statement, where \displaystyle p is our answer, and solve:

\displaystyle \frac{p}{100} = \frac{85}{400}

\displaystyle \frac{p}{100} \cdot 100 = \frac{85}{400} \cdot 100

\displaystyle p = \frac{85 \cdot 100}{400} = \frac{85 }{4} = 21 \frac{1 }{4} \%

Example Question #142 : Concepts

In a class of 120 students, 108 of them decide to attend a field trip. What percent of the students do not attend the field trip?

Possible Answers:

90%

12%

88%

10%

Correct answer:

10%

Explanation:

If 108 students attend the field trip, 12 students do not.

\displaystyle 120-108=12

To find the percent of students not attending the field trip, divide the number of students not attending by the total number of students, and then multiply that result by 100%.

\displaystyle \frac{12}{120}=\frac{1}{10}=0.10

\displaystyle 0.10\times 100\%=10\%

Example Question #143 : Concepts

Below is the list of candidates for Student Council president, along with the number of votes each won:

\displaystyle \begin{matrix} \textrm{\underline{Student}} &\textrm{\underline{Votes}} \\ \textrm{Kerry}\; \; \; & 95\\ \textrm{Quinn}\; \; \;& 73\\ \textrm{Fellows}\; &54 \\ \textrm{Bester}\; \; & 48\\ \textrm{Jarrow}\; & 29 \end{matrix}

What percent of the students voted for neither Kerry nor Quinn (nearest tenth)?

Possible Answers:

\displaystyle 56.2 \%

\displaystyle 36.2 \%

\displaystyle 53.8 \%

\displaystyle 46.2 \%

\displaystyle 43.8 \%

Correct answer:

\displaystyle 43.8 \%

Explanation:

\displaystyle 95+73+54+48+29= 299 students total voted. Out of those, \displaystyle 54 + 48 + 29 = 131 voted for a candidate other than Kerry or Quinn.  To convert this to a percent, use this proportion and solve for \displaystyle p :

 

\displaystyle \frac{p }{100}= \frac{131}{299}

\displaystyle \frac{p }{100} \cdot 100= \frac{131}{299} \cdot 100

\displaystyle p = \frac{13,100}{299} \approx 43.8 \%

Example Question #27 : Percentage

A $200.00 cell phone is on sale for 15% off. What is the sales price of the cell phone?

Possible Answers:

\displaystyle 170

\displaystyle 185

\displaystyle 215

\displaystyle 150

Correct answer:

\displaystyle 170

Explanation:

First multiply:

\displaystyle 200*\displaystyle .15\displaystyle =30

Then, subtract that amount from the original price:

\displaystyle 200-\displaystyle 30=\displaystyle 170

Answer: The cell phone costs $170.00.

Example Question #143 : Concepts

Simplify:

\displaystyle \frac{3}{5}\%

 

Possible Answers:

\displaystyle 0.6

\displaystyle 0.06

\displaystyle 0.006

\displaystyle 0.0006

\displaystyle 6

Correct answer:

\displaystyle 0.006

Explanation:

Percent means "per one hundred" or "divided by one hundred". To convert a percentage to a decimal we should move the decimal point two places to the left. So we can write:

 

\displaystyle \frac{3}{5}=0.6

So we get:

 

\displaystyle 0.6\%\displaystyle =0.006

Example Question #144 : Concepts

What is the decimal equivalent of \displaystyle 18\%?

Possible Answers:

\displaystyle 0.82

\displaystyle 0.018

\displaystyle 1.8

\displaystyle 1.18

\displaystyle 0.18

Correct answer:

\displaystyle 0.18

Explanation:

To find the decimal equivalent of a percentage, divide the percentage by \displaystyle 100.

\displaystyle 18 \div 100=0.18

Example Question #145 : Concepts

What is the decimal equivalent of \displaystyle 22\%?

Possible Answers:

\displaystyle 0.78

\displaystyle 0.0022

\displaystyle 0.022

\displaystyle 0.22

Correct answer:

\displaystyle 0.22

Explanation:

To find the decimal equivalent of a percentage, divide the percentage by \displaystyle 100.

\displaystyle 22 \div 100 = 0.22

Example Question #146 : Concepts

What is the decimal equivalent of \displaystyle 55\%?

Possible Answers:

\displaystyle 5.5

\displaystyle 0.0055

\displaystyle 0.55

\displaystyle 0.45

\displaystyle 0.055

Correct answer:

\displaystyle 0.55

Explanation:

To find the decimal equivalent of a percentage, divide the percentage by \displaystyle 100.

\displaystyle 55 \div 100 =0.55

Example Question #147 : Concepts

What is the decimal equivalent of \displaystyle 46\%?

Possible Answers:

\displaystyle 0.046

\displaystyle 0.0046

\displaystyle 4.6

\displaystyle 0.46

Correct answer:

\displaystyle 0.46

Explanation:

To find the decimal equivalent of a percentage, divide the percentage by \displaystyle 100.

\displaystyle 46 \div 100 =0.46

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