- Determine the two consecutive multiples of 100 that bracket 21,536
- 21,536 is between 21,500 and 21,600
- 21,550 is the midpoint between 21,500 and 21,600
- As illustrated on the number line, 21,536 is less than the midpoint (21,550)
- Therefore, 21,536 rounded to the nearest hundred = 21,500
