Problem-Solving and Data AnalysisMediumPercent of a percent
Problem-Solving and Data Analysis practice question
In a survey, 60% of the respondents own a car, and 25% of those car owners own an electric car. What percent of all the respondents own an electric car?
Answer: 15
25% of 60% is 0.25 × 0.60 = 0.15, so 15% of all respondents own an electric car.
Common wrong answers
- If you answered 25
- 25% is the share of CAR OWNERS with an electric car. As a share of all respondents it is smaller: 25% of 60%.
- If you answered 35
- 35 subtracts them. A percent OF a percent is found by multiplying: 0.25 × 60 = 15.
- If you answered 85
- 85 adds the two percentages, but the 25% applies only to the car owners, not to everyone.
More Problem-Solving and Data Analysis questions
- Medium
A car travels 150 miles in 2.5 hours. At this rate, how far will it travel in 4 hours? - Medium
The price of a stock rises from $40 to $50. What is the percent increase? - Medium
Based on the model, what score does the line predict for a student who studies 5 hours? - Medium
A population decreases from 250 to 200 over a year. What is the percent decrease? - Medium
If one person is chosen at random from those who prefer tea, what is the probability the person is under 30? - Medium
What is the difference between the mean and the median of this data set?
Not affiliated with the College Board. SAT is a trademark of the College Board.