In the Hours Grid method of entering hours, you can select whether to enter in hours and minutes or hours and tenths of an hour. That is set in:
File | Preferences | General tab | Hours Display [ Hours and minutes | Hours and tenths of hours ]
No matter which method of entering fractions of an hour, reports will display them in decimal format.
Here are short and long conversion charts for minutes to decimal hours which can help people who are entering hours in hours and minutes.
Quick Chart 3 minutes = 0.05 hours 6 minutes = 0.10 hours 9 minutes = 0.15 hours 12 minutes = 0.20 hours 15 minutes = 0.25 hours 18 minutes = 0.30 hours 21 minutes = 0.35 hours 24 minutes = 0.40 hours 27 minutes = 0.45 hours 30 minutes = 0.50 hours 33 minutes = 0.55 hours 36 minutes = 0.60 hours 39 minutes = 0.65 hours 42 minutes = 0.70 hours 45 minutes = 0.75 hours 48 minutes = 0.80 hours 51 minutes = 0.85 hours 54 minutes = 0.90 hours 57 minutes = 0.95 hours Minutes to Decimals Conversion Chart min = decimal hours :01 = .02 :02 = .03 :03 = .05 :04 = .07 :05 = .08 :06 = .10 :07 = .12 :08 = .13 :09 = .15 :10 = .17 :11 = .18 :12 = .20 :13 = .22 :14 = .23 :15 = .25 :16 = .27 :17 = .28 :18 = .30 :19 = .32 :20 = .33 :21 = .35 :22 = .37 :23 = .38 :24 = .40 :25 = .42 :26 = .43 :27 = .45 :28 = .47 :29 = .48 :30 = .50 :31 = .52 :32 = .53 :33 = .55 :34 = .57 :35 = .58 :36 = .60 :37 = .62 :38 = .63 :39 = .65 :40 = .67 :41 = .68 :42 = .70 :43 = .72 :44 = .73 :45 = .75 :46 = .77 :47 = .78 :48 = .80 :49 = .82 :50 = .83 :51 = .85 :52 = .87 :53 = .88 :54 = .90 :55 = .92 :56 = .93 :57 = .95 :59 = .98 :60 = 1.00