HSPT Math : How to work with percentages
Study concepts, example questions & explanations for HSPT Math
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Example Questions
Example Question #101 : Hspt Mathematics
To get on the ballot for senior class president, a student must have the signatures of 15% of the senior class. Out of 341 seniors, 52 have signed Clinton's petition. How many more signatures does Clinton need to get on the ballot?
Clinton has enough signatures to get on the ballot.
Clinton has enough signatures to get on the ballot.
15 % of the 341 members of the senior class is
Since Clinton has 52, he has enough signatures.
Example Question #101 : Hspt Mathematics
Bill decides to donate 15% of his $4000 and Ted decides to donate 25% of his $8000. What percentage of their combined fortunes do Bill and Ted donate?
21.7%
19.2%
22.3%
23.1%
20%
21.7%
This is a simple problem, so long as you don't forget that Bill and Ted have different amounts of money, so you can't simply average 15% and 25% to get 20%.
Calculate how much each donates:
4000(.15)= 600
8000(.25)= 2000
Now divide the total donation by their total wealth:
Now multiply this answer by 100, and then round to the nearest tenth to get 21.7%.
Example Question #43 : How To Work With Percentages
If you have a garden in which you planted 120 seeds, what percentage sprouted if you have 90 plants?
To find the percent you must put the part over the whole,
Whole is represented by the number of seeds planted and the part represents the number of plants in the garden.
Substitute the values into the percent formula
Now multiply by 100 to make it a percent which is 
Example Question #103 : Hspt Mathematics
What percent of 96 is 24?
Translate the sentence into an equation
Isolate 
Remember that the question is asking for a percentage, so convert 
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