1. 2/3 is the ratio for female student to male students
2. 1/12 is the ratio for teachers to male students
3. 20/1 is the ratio for the total amount of students to teachers
4.3/5 is the ratio for male students to the total amount of students
Step-by-step explanation:
1. To get the simplest ratio for 320/480 you need to divide both numbers by 160 and if solved correctly, you would get 2/3 and that number cannot be simplified any further so your answer will be 2/3.
2. To get the simplest ratio for 40/480 you need to divide both number by 49 and if solved correctly, you would get 1/12 and that number cannot be simplified any further so that would be your final answer
3. For this, you first need to find the total amount of students and this is easy by just adding 480 and 320. The answer will be 800 and to find the simplest fraction of 800/40, simply divide both numbers by 40 and you will get 20/1
4. Since we now know the total amount of students we just need to find the simplest answer for 480/800 and the greatest number you can divide both of these by is 160 and your answer would be 3/5 which is also the most simplest ratio.