If you mean .820 then it is 0.91 rounded to the nearest hundredth
820
This cannot be properly answered because you did not say what place to round it to. For example; nearest whole number, hundreds, tenths, etc.
It's already there.
It depends on what degree it is rounded to. To the nearest ten thousand it is 820 000. To the nearest billion, it is 0.
800
820
820
820 is already rounded to the nearest tens place.
820
820
If you mean .820 then it is 0.91 rounded to the nearest hundredth
Rounded to the nearest 10, 819 is approximately equal to 820.
820
820
Rounding the number 820 to the nearest hundred would bring it to 800.
820