2/3
Yes you can. There are many different ways of playing. Some people put a +4 card over a +2 card and some don't (I recommend to do it the +4 over +2 way)
2/3 or two thirds
two fifths
x^-2
2/8
1 over 2, 1/2, one half, a half, two fourths, 2/4 Save
In Uno, you can stack Draw 2 cards on top of each other, but you cannot stack Draw 4 cards. This means if a player plays a Draw 2 card, the next player can play another Draw 2 card to make the following player draw 4 cards. However, if a player plays a Draw 4 card, the next player cannot stack another Draw 4 card on top of it.
2/3 or .6 repeated.
YES
They must draw 2 cards and miss a turn, however if they have another draw 2, they can put this ontop and make the next person draw 4!
. 2/3 is the same as 66.66666% (6 is reoccurring)
In Uno, the stacking draw 2 rule allows a player to play a Draw 2 card on top of another Draw 2 card. The next player must then draw 4 cards, unless they also have a Draw 2 card to play, in which case the penalty is passed on to the following player.