So he worked out for 360 minutes each day, for 6 days.
360 / 6 = 60, so Allen worked out for 60 minutes each day.
We're trying to find how much he jogs, so we subtract 45 minutes, the amount he bikes, from 60 minutes, the total time worked out
60-45 = 15
Allen jogged 15 minutes each day last week
I hope this helps :)