What is 11 hours 43 minutes expressed in decimal hours, to two decimal places?

• A. 11.72 hours
• B. 11.50 hours
• C. 12.00 hours
• D. 11.00 hours

Answer: (A)

Converting hours and minutes to decimal hours treats the minutes as a fraction of an hour. Twenty-three minutes would be 23/60 of an hour, and so on. Here, 43 minutes equals 43/60 of an hour, which is about 0.7167 hours. Adding that to 11 hours gives 11.7167 hours. Rounding to two decimal places yields 11.72 hours. The other options would require different minute values (for example, 30 minutes would give 11.50, 60 minutes would give 12.00, and 0 minutes would give 11.00).