Calculation new price based on percentage

[MarkMol23]

Hello everyone,

I'm working on some price calculations.

Let's say that I have a product with a New Price of 99,90 $ which I have entered manually.
I need to show a 70% percentage sale on this price.
Basically, I do the following
99,90 * 1,70 = 169,83 $ (I added %70 to the New Price)
But, my system shows only a 41% percentage sale because the system calculates as follows:
Original Price minus New Price = Sale Amount
The percentage of the Sale Amount is the Sale Percentage.
So in my example:
169,83 - 99,90 = 69,93 $
(69,93 / 169,83) * 100= 41%
but this is not the percentage I want to show on my site. I want it to show %70 so I need to calculate a new Original Price based on the New Price and the Percentage that I want to show.

can you please advise how to calculate the Original price based on the New Price?

Thank you very much.

 

[Otis]

how to calculate the Original price based on the New Price

Hi MarkMol. If an original price is reduced by 70%, then the customer pays 30% of the original price.

100% – 70% = 30%

You would like the customer to pay $99,90

Therefore, your question is: 30% of what amount equals 99,90?

Let x = original price

In other words: 30% of x is 99,90

0,3x = 99,90

Do you know how to solve that equation?
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[MarkMol23]

Hi Otis, I'd like to thank you very very much for the solution. ?
Yes the equation is solved by dividing $99,90 by 0,3 so x equals $333

Thanks again.