How to calculate original amount before the discount?

Question

I have an amount I want to receive: 350€

I know from the original request I will have to do a discount: 40%

What is the original request I have to ask?

350 = x - (x * 40%)

Where x = Original Request

Excuse me if this question is too naïve or already answered. Possible I am not doing the proper search.

Answer 1

From @lulu comment

350 = x - 0.4x
350 = 1x - 0.4x
350 = (1 - 0.4)x
350 = 0.6x
350 / 0.6 = x

x = 583.3333