Question 936428
These are hard to read ( for me also )
You almost have to rewrite them to 
understand.
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For (a), I would say: " I an first looking at Portland's 
sales, and then I want to compare Seattle's sales
with Portland's. So what I'm looking for is:
( Seattle's sales - Portland's sales ) / ( Portland's sales )
{{{ ( 410000 - 295000 ) / 295000 }}}
{{{ 115000 / 295000 }}}
{{{ .3898 }}} about 39%
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(b) I am looking at Seattle's sales, and I want to compare
Portland's sales to Seattle's. I want to look at:
( Seattle's sales - Portland's sales ) / ( Seattle's sales ) 
{{{ ( 410000 - 295000 ) / 410000 }}}
{{{ 115000 / 410000 }}}
{{{ .2804 }}} about 28%
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(c) You are not looking at differences here- it's just a
straight comparison. The fraction you need is:
( Portland's sales ) / ( Seattle's sales )
{{{ 410000 / 295000 }}}
{{{ 1.389 }}} about 139%
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Get other opinion's, too. If a teacher contradicts me,
then go with the teacher. I think I'm right, though