A passenger train has 812 people seated. Each train seats 70 people. So there are 11 train cars filled. How many people are in car not full

Agroup of five people go out to eat and buy appetizers and main dishes they decide to split the bill so each person pays 20% of the total cost appetizers are $5 and main dishes are $10 write an expression to show how much each person pays explain it with how to solve the problem