3 ms·The one I remember is .333 (repeating) = 1/3. .333(3)=.999. 1/3(3)=1. Therefore, .999=1.by dcpdx 15y agoThe one I remember is .333 (repeating) = 1/3. .333(3)=.999. 1/3(3)=1. Therefore, .999=1.