to find out how much pizza is needed, multiply 4/7 by 18 to get 72/7. round up to get 77/7 or 11 pizzas. 77/7 - 72/7= 5/7 so there will be 5/7 left over
IF I want to rent the paddleboat I have to start with $10 and I have it for an hour it will be 18$. We are increasing by 8 for every hour we have the boat