Question 854105
The ratio must be:
( concentrate ) / ( cold water ) = {{{ 5/8 }}}
I can also say:
( concentrate ) / ( concentrate + cold water ) = {{{ 5 / ( 5 + 8 ) }}}
( concentrate ) / ( concentrate + cold water ) = {{{ 5/13 }}}
and, also:
( concentrate ) / ( 1 cup of mix ) = {{{ 5/13 }}}
concentrate = {{{ 5/13 }}} cup