Level 2
The ratio of Liam's to Mark's money is 7 : 9. The ratio of Mark's to Ian's money is 8 : 1. If Liam has $112, how much less does Ian have than Mark?
Level 2
Hillary bought 12 buns and 15 doughnuts altogether. One bun is y ¢ and one doughnut is $2. She gave the cashier $50. Express her change in terms of y in cents.