Answer:The ratio of male students to male teachers is part to part ratio with different quantities
The total numner of sixth grade students = 180
Male students = 90
Female students = 90
Male teachers = 2
Female teachers = 8
Total number of teachers = 10
The ratio of male students to male teachers =
The ratio of male students is part ratio of the total number of sixth grade students
The ratio of the male teachers is also part ratio of the total number of teachers
Though, they have different quantities
Therefore, the ratio of male students to male teachers is part to part ratio with different quantities
