Answer :

1. Chicken
What number is 8% of 575?
x = .08 * 575
x = 46 students

2. Salad
What number is 20% of 575?
x = .20 * 575
x = 115 students

3. Burgers
What number is 16% of 575
x = .16 * 575
x = 92 students
4. Fruit
What number is 24% of 575
x = .24 * 575
x = 138 students
1.Chicken
What is 8% of 575?
x=575(.08)
x=46 students

2.Salad
What is 20% of 575?
x=575(.2)
x=115 students

3. Burgers 
What is 16% of 575?
x=575(.16)
x=92 students

4. Fruit
What is 24% of 575?
x=575(.24)
x=138 students

46+115+92+138=575