Question 876001
<pre>
"j" will stand for job or jobs, and "d" will stand for day or days.

His rate is {{{5/8}}} j per 10 d.  So his rate in j per d is

{{{matrix(1,2,5/8,j)/(matrix(1,2,10,d))}}} {{{""=""}}} {{{(expr(5/8)/10)}}}{{{j/d}}} {{{""=""}}} {{{(matrix(1,3,expr(5/8),"÷",10))}}}{{{j/d}}} {{{""=""}}} {{{(matrix(1,3,expr(5/8),"×",1/10))}}}{{{j/d}}} {{{""=""}}} {{{5/80}}}{{{j/d}}} {{{""=""}}} {{{1/16}}}{{{j/d}}}

or 1 job per 16 days.

So he can complete 1 job in 16 days.

Edwin</pre>