Answer:
Because it is not 150, you round lower to 100 to get to the nearest hundred.
Hello!
The answer is 100.
The number that determines what the nearest hundred is is 50. Because 138 is below 150, the nearest hundred is 100. If the number were to be 150 or above, the nearest hundred would be 200.
I hope this helps you! Have a lovely day!
- Mal