Tia wanted to know what is 20% off etc. She wanted to know about the 20%. That is the subject of the question. The use of the wrong word leads to ambiguity but is almost universal – sadly.
Tia wanted to know what is 20% off etc. She wanted to know about the 20%. That is the subject of the question. The use of the wrong word leads to ambiguity but is almost universal – sadly.