Divide 850 by 2 = 425 $ for each person
Divide 425 by 2 = 212.5 $
Explanation: I divided the money to 4 quarters.
The first person will pay 3/2 or 150% of the money then
425+212.5= 637.5 $
And the second person will pay
850-637.5= 212.5 $ which is a quarter of the money .
I hope this helped :)