Excuse me, I still wonder if we can really say 2/3 of ...In my opinion, it couldn't be expressed like that.
I remember reading a sentence like: He is twice as tall as me/I am.
So can we apply the same structure in this situation - I mean, can we say: ..., though the quality of their products is about 2/3 as good as that of ours?
Moreover, what does "sell" mean here when we say: "Their products sell very well"? Does it mean "make people want to buy sth"?
Can you please help me to clarify it?
Thank you!