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....
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