Verified Answer :

What
changes may occur if the given dollar will be rounded off to its nearest value.

There will only be 2 chances, the dollar will become smaller or bigger. Why?

Because in mathematical rules of rounding off numbers:

number below 5 will be round down and 5 and up will be rounded up.

For example:

You have a bill of $6.79  since the
number next to the decimal point in the right is 7, it will be rounded up to
$7.

But if your bill is $6.25, it will be rounded down to $6.00