if we had a value "z", and we'd like to know how much is 16% of "z", well
so we can use the "factor" of 0.16, to get the 16% of any value,
since 0.16 is the decimal representation of the percentage of 16.
hmmm what is 16% of 50 anyway?
8 out of 50
how much is 16% of 25 anyway?
4 out of 25