CAN SOMEONE PLEASE HELP ME WITH THIS QUIZ QUESTION

John bought 5 lemons and used 2 of them for a salad how much did he use for. a salad . he used % of the lemons.

Customers at an ice-cream shop took a survey .the results showed that 144 customers rated the shop as being "very satisfactory ."this number represented 45%of the total nunber of customers who took the survey

Your friend uses c=50p to find the total cost, c, for the people, p, entering a local amusement park is the cost of admission proportional to the amount of people entering the amusement park? explain.