Hello
To calculate the net price of a discount series, we have a set of values which are given (20/10/5).
Subtract 100 from each of these numbers and represent it in decimal the multiply all of them together to get the net price of the discount
20/10/5 is equal to

Let's use the net price factor to find the net price of the item

From the calculation above, the net price of the discount is equal to $47.88