When rounding to the nearest hundred, if the number in the tens place is less than 5, you should round downwards (keep the same number shown in the hundreds place). However, if the number in the tens place is 5 or greater, than you have to round up, which means adding one to the number currently in the hundreds place.
So, for this problem, the digit 1 is in the tens place. Because 1 is less than 5, we know that we have to round down.
Thus, 218 rounded to the nearest hundred is 200.
Hope this helps!!
