Why wrong: Proportions in English use out of and not on. French uses sur (deux sur trois), as if the number two were sitting on the number three, as in 2/3. English uses another metaphor: that of a group containing three members and two of them are removed (taken out of) the group. So, we take two out of three, hence the idiom. To speak properly,
Correct it: Say “Two out of three like it.” It is also possible to say “Two thirds like it.”
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