Question 929596
{{{5/8 = x/(1-x)}}} where x is the fraction of 1 cup
Do cross products
{{{8x = 5(1-x) }}}
{{{8x = 5 - 5x}}}
add 5x to each side
13x = 5
divide each side by 13
 x = 5/13 cup
 {{{(1-x) =(1 - 5/13)}}}
   1-x = 8/13 cup
So we need a mixture of 5/13 concentrate with 8/13 water
If we want ounces we need 8*(5/13) with 8*(8/13)
 or 40/13 ounces with 64/13 ounces
 or 3.077 ounces with 4.92 ounces