When you build and run a timesheet report via:
Reporting > Report builder
it shows the Timesheet total hours time worked as a decimal fraction rather than in minutes and hours. This is done so the calculations are able to be correctly utilised when totalling.
for example, 9.750 is NOT nine hours seventy five minutes but is nine and three quarter hours or nine hours forty five minutes.
To convert the .75 decimal fraction to minutes, multiply .75 by 60 and you will get 45 minutes.
If you see an entry that shows 8.217 hours like this, then multiply .217 by 60 and you will get 13 minutes.
There are many web sites that can carry out Time to Decimal and Decimal Time to Minutes calculations if you need additional help.