Question

I found a place that will give me a 20% discount if I spend over 50$.My bill is 75$.How much will I save?

Answer 1

If bill was already discounted=
120/100 x 75 = 90
90-75 = 15

If bill was not discounted =
80/100x75 = 60
75 -60 = 15

Either way you'll save $15