SOLUTION: I accidentally decreased a number by 60% instead of increasing it by 60%. This incorrect value now needs to be increased by k% to get to the correct value.What is the value if k?

Question 1111252: I accidentally decreased a number by 60% instead of increasing it by 60%. This incorrect value now needs to be increased by k% to get to the correct value.What is the value if k?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
is the decimal value
If is the original number, I want
to end up with
--------------------------
I'm starting with

-----------------
k% = 400%
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