A random sample about people's favorite primary color yielded the following results.

Color Number

blue 9

yellow 2

red 4

Find the percentage of people in the sample who prefer blue.

67%

27%

13%

60%

To find the percentage, you must know the number of people who preferred blue, which is 9, out from the total number of people in the sample.

Total = 9 + 2 + 4 = 15

So, the percentage is: 9/15 * 100 = 60%.

The answer is 60%.