Fractions Solving

This week for maths I was sloving a promblem with fractions. The qestions was Bob has $30 to spend at Rainbow's End. He spends ⅔ of it in the ticket 7/10 of the remaining amount at the shop. After that spends ⅔ of what's left on food. How much money did he take home?What you do first is Divided 3 and 30 which will equal 10 then you times 2 and 10 which will equal 20 and your answer is 20 dollars.