CODEWITHSUNDEEP
vb.net
mehrdad
mehrdad

Reputation: 17

Calculate the discount rate

I have the original price of a commodity and its discounted price. I currently have some code but it is not working properly.

For example: The price of a pre-discounted commodity is 853.2 $. The discounted price is 349 $. That is a 59% discount, but my code shows the wrong numbers.

Dim a1 As String = (Val(pre-discounted_price) - Val(discount_price) * 100 / Val(discount_price)).ToString

Dim a2 As Integer = (853.2 - 349) * 100 / 349

Upvotes: 0

Views: 211

Answers (1)

Caius Jard
Caius Jard

Reputation: 74605

The formula for calculating how much you need to discount something by, to reach a new price is:

100 * (originalprice - newprice) / originalprice

100 * (852.3 - 349) / 852.3 = 59 (0 decimal places)

Checking:
852.3 - (852.3 * 0.59) = 349 (approx)

Your code went wrong because you divided by the newprice

Upvotes: 1

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