1/3x3 is 1 but divide 1 by 3 and then multiplying the answer with 3 is 0.999etc... dafuq?
This is an example of how 0.99999... can equal 1. Strange, but get deeper in these type of equations this makes sense.
One of our members, Alan, could tell you precisely why this happens, but
If you key in (1/3) * 3 the calculator will interpret this as (1 * 3) / 3 = 3/ 3 = 1
However.....if you key in 1/3....you will get the fraction's decimal representation of .3333...
And multiplying this by 3 = .99999....