SAT Math : Percentage
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Example Questions
Example Question #4 : Whole And Part
Three salesmen, Gor, Levon, and Raffi, competed to sell the highest number of cars in the month of August. A total of 250 cars were sold.
Gor sold 100 cars. Levon sold 62% of the remaining cars, and Raffi sold the rest.
How many cars did Raffi sell?
39
57
75
93
77
57
We first subtract the 100 cars that Gor sold from the total of 250 sold. We are left with 150 cars, and we know that Levon sold 62% of them. 100% – 62% = 38%. Hence, Raffi sold 38% of 150 cars. 150 * 0.38 = 57
Example Question #11 : How To Find The Part From The Whole With Percentage
A school is made up of 400 students. Each student must belong to one of the four clubs shown in the chart below. How many students are in chorus?
You must first determine the percentage of the students in chorus. To do this, subtract the other percentages from 100: 100 – (35 + 29 + 24) = 12.
Therefore, 12% of the 400 students at this school attend chorus.
To determine the number of students in the chorus, multiply .12 (12%) by 400.
0.12(400) = 48
Example Question #10 : How To Find The Part From The Whole With Percentage
What is 16% of 32?
There are two ways to solve this problem.
First, we can convert the given percentage to a decimal and multiple by the whole.
16% = 0.16
Secondly, we could set up a proportion. We are given the whole from which a percentage is taken, so we can say:
To solve, cross multiply and simplify.
Example Question #33 : Percentage
An artist's new album sold 
Let's set up a proportion to solve this problem, where 
Now, we can solve for the unknown by cross-multiplying.
Example Question #11 : Whole And Part
Jane called one thousand times to tell you she's sorry. If you saw she was calling and let your phone go to voicemail 
None of the given answers
To solve this problem, we can set up a proportion. Remember we can express percentages as fractions. Let 
Now, we can cross-multiply and solve for the unknown.
Example Question #1081 : Sat Mathematics
Cannot be determined
To solve this we need to set up a proportion.
Now we cross multiply
Divide by 180.
Example Question #1082 : Sat Mathematics
David's trip expenses are pictured in the above pie chart (numbers = % of his total expenses). If he spent $75 on taxis, how much did he spend on hotel and souvenirs combined?
$225
$175
$200
$40
$250
$200
David spent $75 on taxis, which were 15% of his total expenses on the trip. He therefore spent 75(100/15) = $500 on the trip altogether. The hotel and souvenirs make up 35% + 5% = 40% of his total expenses. 40% of 500 is $200.
Example Question #2 : How To Find The Whole From The Part With Percentage
30% of what number is 20?
Solve to the nearest hundredth.
None of the other answers
150%
66.67
0.67
1.5
66.67
This is a very basic form percentage question. This can be rewritten:
0.3 * x = 20
(Remember, the word "of" in a word problem indicates multiplication, while the word "is" indicates an equals sign).
Solve for x: x = 20 / 0.3 = 66.67
Example Question #3 : How To Find The Whole From The Part With Percentage
A toy is on sale for 43% off. Its sale price is $21.37. What is the full price?
None of the available answers
An algebraic expression for this item is:
Example Question #4 : How To Find The Whole From The Part With Percentage
Twenty-six students planned to contribute an equal amount to purchase a gift for their teacher. After 18 students had paid, they had collected $76.50. What is the total price of the gift?
If $76.50 had been collected after 18 students had paid, we can determine how much each student contributed:
$76.50/18 = $4.25 per student
Now we can multiply this by the total number of students (26) to get the full price of the gift:
26 x $4.25 = $110.50
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