- Determine the two consecutive multiples of 100 that bracket 232,860,421
- 232,860,421 is between 232,860,400 and 232,860,500
- 232,860,450 is the midpoint between 232,860,400 and 232,860,500
- As illustrated on the number line, 232,860,421 is less than the midpoint (232,860,450)
- Therefore, 232,860,421 rounded to the nearest hundred = 232,860,400
