Question 607306
Let {{{x }}} = the number of radios he sells
before the increase in sales, his profit is
{{{ .45x }}}
After his sales increase,
{{{ .4*( 1 + .1)*x = ( .4 + .04 )*x }}}
{{{ .44x }}}
The ratio of his new total profit to the original profit
{{{ .44x/.45x = 44/45 }}}