Mrs. Grape has 90 students. On her last test, 3/10 of these students earned an A. Of those students, 1/9 got a perfect score. How many students got a perfect score?

3 students

Step-by-step explanation:

Mrs. Grape has 90 students. On her last test, 3/10 of these students earned an A.

Hence, the number of students that had an A = 3/10 × 90

= 3 × 9 = 27 students

Of those students, 1/9 got a perfect score.

This means of the 27 students, 1/9 had a perfect score.

This means:

1/9 of 27 students = 1/9 × 27

= 3 students

How many students got a perfect score?

Hence, 3 students got a perfect score.

if you are looking for the unit rate then the answer would be 9 because unit rate is distance divided by time.

step-by-step explanation: