Question 717828
<pre>
Either this way:

10 is to x as 9 is to .5

{{{10/x}}}{{{""=""}}}{{{9/.5}}}

 9x = 10·.5
 9x = 5 
  x = {{{5/9}}} &#8776; .555556

or this way:

10 is to x as 18 is to 1

{{{10/x}}}{{{""=""}}}{{{18/1}}}

18x = 10
  x = {{{10/18}}}
  x = {{{5/9}}} &#8776; .555556

Edwin</pre>