1. The problem is to find the difference between the two date-time values: 18/09/2025 13:54 and 16/09/2025 14:39. 2. Convert both date-time values into a consistent format (e.g., total minutes or total hours) for easier subtraction. 3. Calculate the total time from 16/09/2025 14:39 to 18/09/2025 13:54 stepwise. 4. From 16/09/2025 14:39 to 17/09/2025 14:39 is exactly 24 hours. 5. From 17/09/2025 14:39 to 18/09/2025 13:54 is less than 24 hours, calculate: - Hours difference: 13:54 - 14:39 = -45 minutes, so subtract 1 hour, add 60 minutes. - Effective time difference: 23 hours 15 minutes. 6. Add the two intervals: 24 hours + 23 hours 15 minutes = 47 hours 15 minutes. 7. Convert total time difference into hours: 47 + 15/60 = 47.25 hours. 8. The difference between the two dates is therefore 47 hours and 15 minutes or 47.25 hours.