1. Timekeeping 101 Minutes to Decimals

2. 4.35 hours in NOT 4 hours and 35 minutes. Because time is a number system with 60 as its base (not 100 based) the math is not that easy. In reality 4.35 hours is actually 4 hours and 21 minutes. The calculation is.35 x 60=21 minutes or 21÷60=.35.

3. Tips It helps to think of the basic time conversions we know: 15 minutes is a quarter of an hour,.25 30 minutes is a half of an hour,.50 45 minutes is three quarters of an hour,.75 60 minutes is one hour, 1.00 See the Conversion Chart for all time conversions