450 is exactly midpoint between 400 and 500.
Both of these two figures are the nearest hundreds, especially when compared with options such as 200, 300, 600, 700 etc!
For expedience, it is fairly common to round upwards a figure that is halfway.
In this case, 450 would be rounded up to 500.
But in some fields it is the practice to round down all figures which do not exceed the halfway point. If this is the required approach, then 450 would be rounded down to 400 as being the 'nearest' hundred.
However, in either case, when the figure/sum/amount is exactly at the half way point, then both the upper and the lower options are the 'nearest,' both being exactly the same 'distance' away from the amount in question.
e.g.
500
Anything from 450 to 549
When rounding a number, you look at the digit to the right of the place value you are rounding to. In this case, 450 is being rounded to the nearest ten. The digit in the tens place is 5, which is greater than 4, so you would round up. Therefore, 450 rounded to the nearest ten is 450.
3400
400
What is the nearest 100 of 450
The nearest hundred to 3,490 is 3,500.
It is: 500
500
One answer is 450
450
500
Numbers from 450 to 549.
It is 500.
Anything from 450 to 549
Any from 450 to 549
It is 400 because 402 is less than 450