I am not sure how to properly title the question. I will describe it.
I have a total of 100 seats at a venue. I have two gates to the venue, gate A, and B.
Arbitrarily I want to have 30% of the attendees pass through gate A, and the other 70% enter via gate B.
I take a look at the people who entered I find that 50 people entered out of 100. 40% currently passed through gate A, and 60% passed through gate B.
What would be the formula to find out what percentage of the people I need pass through gate A, and gate B to get close to the 30% gate A, and 70% gate B ratio.
Merci!
Merci beaucoup, and let's work out how many people passed through A and B respectively: $50×40\%=20$ and $50×60\%=30$ respectively.
This leaves 10 and 40 people left to go through to reach the desired ratio. So of the remainder, you need 20% to go through A and 80% through B.