I recommend to give time format in a following format for every export.
  1. If tracked time is 4 hours and 15 minutes then it should display 4.25 as well in another column
  2. If tracked time is 4 hours and 30 minutes then it should display 4.5 as well in another column
  3. If tracked time is 4 hours and 45 minutes then it should display 4.75 as well in another column
  4. If tracked time is 5 hours then it should display 5 as well in another column