Question about DAX Measurements

[PrivateAnalytic]

So I am working on creating an efficiency metric between 2 different reports. The first report will be displaying the amount of miles a car has driven. And then I currently have a report which is displaying the amount of time a person is driving which can be filtered down to the type of vehicle they have. 

The efficiency metric is going to be used to help display the amount of miles per day that said person is driving. I was able to bring in the table into from the first report into my report, however I have no idea how I should be writing this DAX Formula to create the measurement. 

[amitchandak]

@PrivateAnalytic , You need to have a common dimension between two tables, like person time. Then you can sum(Table1[Mile])  and divide it sum(Table2[Time in hour])

Bridge Table: https://www.youtube.com/watch?v=Bkf35Roman8&list=PLPaNVDMhUXGaaqV92SBD5X2hk3TMNlHhb&index=19