Jack collected 18 ten dollar bills while selling tickets for a show. He gave 1/6 of the bills to the theater and kept the rest. How much money did he keep

If Jack gave 1/6 of the money to the theater and kept the rest, that means he kept 5/6 of the money. Multiply 18 by 5/6. 18* 5/6 = 15. Jack kept 15 ten dollar bills. Each bill is worth 10 dollars, so multiply 15 by 10. 15*10=150. Jack kept 150 dollars.