I have a number of formulas that are showing incorrect results.
One of these works out to be (with each value coming from another cell or
lookup table):

=.69-(ROUND(.03*22,8,2))
or
=.69-ROUND(.684,2)
or
=.69-.68
or
=.01

However, I get 0.0099999999999999
Other calculations yield similar results. Sometimes ending with a 95 or 98
instead of 99.

Now, I know I can work around this by inserting additional ROUND statments
in my formula, but I'd like to understand how this error is getting
introduced.

If I just type in =.69-ROUND(.648,2), I STILL get a multi-digit answer.
Even =.69-.68 doesn't come out to .01.

I don't recall having this kind of error in previous versions of Excel.
What's up here?