- Determine the two consecutive multiples of 100 that bracket 39,645
- 39,645 is between 39,600 and 39,700
- 39,650 is the midpoint between 39,600 and 39,700
- As illustrated on the number line, 39,645 is less than the midpoint (39,650)
- Therefore, 39,645 rounded to the nearest hundred = 39,600
