All ACT Math Resources
Example Questions
Example Question #71 : Percentage
Above is a chart showing the students and the different activities they are involved in. What percentage of the students are on the soccer team? Round to the nearest tenth of a percent.
32.5%
25.0%
40.0%
37.5%
30.0%
37.5%
Percentage = Students on Soccer Team / Total Number of Students
= 3/8 = .375 = 37.5%
Example Question #72 : Percentage
What percentage of the students are involved in both newspaper and soccer?
25%
15%
30%
20%
35%
25%
There are three students involved in soccer. Read across the chart and two of them are also involved in newspaper.
Percentage = 2/Total Number of Students
= 2/8 = .25 = 25%
Example Question #73 : Percentage
The average person spends 30% of their life sleeping. Assuming the average person lives till the age of 93, how many years will they have spent asleep? Round to the nearest whole number
30 years
9 years
28 years
19 years
31 years
28 years
This problem requires simple arithmetic, 30% of 93 can be obtained by multiply 93 X .30 = 27.9 Rounding yields 28 years.
Example Question #14 : How To Find Percentage
What is 9% of 8,100?
729
459
836
2,700
900
729
8,100 * 0.09 = 729
Example Question #11 : Other Percentage
76 eleventh-grade students turned in term papers on the United States Constitution. 3 students failed, 26 students recieved C's, 31 students recieved B's. The remaining students earned A's on their papers.
What percentage of students earned A's on their paper? (Round to the nearest percent.)
Subtract 3, 26, and 31 from 76 to figure out how many students got A's (16).
Example Question #165 : Arithmetic
What is of
To find the percentage of a number, convert the percentage into a decimal by diving the percent by 100.
,
then multiply that decimal by the number.
Example Question #1238 : Act Math
is what percent of ? Round to the nearest hundredth.
For percentage problems, the easiest way to start is by remembering that the word "of" is best translated as a multiplication, while the word "is" is best translated by an equals sign. Thus, for the information provided, we can write the equation:
Remember, though, that will represent a percentage in a decimal form and will need to be translated. (There are other ways of doing this, but most students remember to do this translation at the end naturally.)
Solving for , you get:
This is .
Example Question #1231 : Act Math
What is of of ?
For percentage problems, the easiest way to start is by remembering that the word "of" is best translated as a multiplication, while the word "is" is best translated by an equals sign. Thus, for the information provided, we can write the equation:
Solving for , you get:
Alternatively you could first calculate of , which is , and then calculate of that, and you would arrive at the same answer.
Example Question #171 : Arithmetic
A computer originally sold for dollars. Its price was reduced by and then again by . What was the final sale price for the computer? Round to the nearest cent.
The most common way to do a problem like this is to begin by applying the first discount, calculating the amount to be removed from the original price. This is done by multiplying the original price by . This gives you . This is then subtracted from to give you . Once again, this new number is multiplied, now by . This gives you . When subtracted from , this gives you a final price of , or the rounded value of .
A simpler way to do this is to realize that the first price reduction makes the new price to be of the original. The second will then make the price to be of the intermediary price. Thus, you could easily compute:
Example Question #1241 : Act Math
A pound man has a body composition made up of pounds of fat, pounds of muscle, and the rest of other organs, fluid, etc. What is the percentage of his muscle composition (in comparison with his toal weight) if he increases his weight in body fat by ? Round to the nearest hundredth of a percent.
As of right now, the man has pounds of body fat. If this increases by , we he will gain or more pounds of body fat. This means that he will have a total of pounds of body fat. Also, it means that his total weight will be pounds. Therefore, his muscle, as a percent of his total weight will be:
or
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