What is 853 951rounded off to the nearest 100
To round off the number 853,951 to the nearest 100, you look at the tens place, which has a '5' in it. According to the usual rules of rounding, if the digit in the tens place is 5 or higher, you round up. If it's 4 or lower, you round down.
Since the digit in the tens place is a '5', you round up. This means you add 1 to the hundreds place and adjust the rest of the digits accordingly, resulting in:
853,900 (before rounding) + 100 (to round up) = 854,000
So, 853,951 rounded to the nearest 100 is 854,000.