- Determine the two consecutive multiples of 100 that bracket 78,423
- 78,423 is between 78,400 and 78,500
- 78,450 is the midpoint between 78,400 and 78,500
- As illustrated on the number line, 78,423 is less than the midpoint (78,450)
- Therefore, 78,423 rounded to the nearest hundred = 78,400
