What is 4.76 hours converted to min and sec

4hr + (.76hr (60min/hr))

4hr + 45.6 min

4hr+45min + (.6min (60sec/min))

4hr+45min+36sec

4:45:36

Oh, if you really only wanted min and sec without hours ...

4hr (60min/hr) + 45min+36sec

240min+45min+36sec

285min+36sec

4.76 hours times 60 minutes gives 285.6 minutes. We already have 285 minutes. 60% of 1 minute is 36 seconds, so the answer is 285 minutes and 36 seconds. : D