Errata....

On Jul 21, 12:32 pm, Stephane Quenson
wrote:
I corrected the first percentage to 0.45%

.... And all the other percentage accordingly. Good pick up! My bad!

On Jul 21, 6:22 pm, I wrote:
I get 0.45, as expected.

Make that 0.0045. Whether or not the OP wants to round and how are
unspecified.

In any case, my "off by 0." error only changes the magnitude of the
result of my formulas, not their correct operation otherwise, I
believe.