9) The distance to Grandma's house is 4/5 of the distance to Uncle Glen's house. If Uncle Glen's house is THREE1/2 hours away, how long will it take to get to Grandma's house if you travel at the same speed?
10) It takes 3/5 of a tank of gas to get to work and back each day. How much gas is used over 5 work days? show your thinking.
11) Owen is TWO1/4 times as old as Robin. When Robin celebrates his 8th birthday, how old will Owen be?
12) The karate club is arranging a grading for its members. It takes THREE1/4 hours to test a group of 4 candidates. How long will the club need the gym in order to process 3 groups of 4 candidates each?