Pewdiepie or T-Series?

Hi my sisters and brothers can tell me the answer because i don’t understand the question

15/16 as a decimal rounded to the nearest hundredth

Arestaurant offers delivery for their pizzas. the total cost the customer pays is the price of the pizzas, plus a delivery fee. one customer pays $23 to have 2 pizzas delivered. another customer pays $59 for 6 pizzas. how many pizzas are delivered to a customer who pays $86?