On a train, 32 out of 50 seats are occupied. What percentage of seats are occupied and what percentage are empty?
In a family, 7 out of 20 members are female. What percentage of the family are female?
There are 1 000 students in a school, 292 of which are in the first grade and 228 of which are in the second grade. The rest of the students are in higher grades. What percentage of students are in higher grades?