Question 555757
{{{ 6/8 = 3/4 }}} parts/min
This is {{{ 3/4 }}} of a part in {{{ 1 }}} minute
{{{ ( ( 3/4) / 1 )*40 = 30 }}}  parts
Note that ( parts/min )*( min ) = parts
They can make 30 parts in 40 minutes