Question

Question #168e6

Answer 1

I am not sure you wanted this but I try...

Explanation:

Consider a product that casts `100`; a `15%` discount means that you pay for it `100-15=85` that is less or you can say that its price was reduced.
Same thing with, say, a temperature; if an object change temperature from `100` to `85` we say that the temperature decreases of `15` or `15%`.

I think that the important thing is the word "discount" that can be thought as similar to reduction; the percentage represents the fraction of 100 that represents this reduction.