Andy's total bill for lunch is $20. the cost of the drink is 15% of the total bill and the rest is the cost of the food. what percent of the total bill did andy's food cost? what was the cost of his food?

this is 6th grade math, the lesson is problem solving percents

plz explain how u found the answer

You are choosing between two health clubs. club a offers membership for a fee of $ 28 plus a monthly fee of $ 20. club b offers membership for a fee of $ 20 plus a monthly fee of $ 22. after how many months will the total cost of each health club be the same? what will be the total cost for each club? in __ months the total cost of each health club will be the same.