Two per cent

I should add another note to yesterday's question instead of hiding clarification in the comments - damn this artificial hundred word limit :)

But I was not trying to trick anybody. There was no lateral thinking required. I was not hiding anything. The weight of the basket is completely irrelevant. It was really just very simple maths. Nothing else.

I was only doing the same thing that I often do in my job as a marketing consultant, showing that a very simple mathematical result does not always correspond with what your "intuition" tells you when you first see the question.

What is correct, the maths or your intuition?