Results 1 to 3 of 3

Math Help - Help Please

  1. #1
    Newbie
    Joined
    Nov 2005
    Posts
    11

    Question Help Please

    USA today, dated October 28, 2002, commented on the decline in sales of the new VW Beetle. This year, sales have fallen from an average 5,584 per month to 4,289 a month. What is the percent decline in sales? Round to the nearest hundredth percent.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    Joined
    Apr 2005
    Posts
    1,631
    "USA today, dated October 28, 2002, commented on the decline in sales of the new VW Beetle. This year, sales have fallen from an average 5,584 per month to 4,289 a month. What is the percent decline in sales? Round to the nearest hundredth percent."

    5,584 - 4,289 = 1,295 cars decline in sales per month.

    (new minus old)/(old) times 100% equals percent of change. -----***

    (4289 -5584)/(5584) *100%
    = (-1295/5584) *100%
    = -23.19%

    Negative percentage, meaning, a decine.
    Therefore, there is a decline of 23.19 percent per month in sales. -----answer.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Grand Panjandrum
    Joined
    Nov 2005
    From
    someplace
    Posts
    14,972
    Thanks
    4
    An interesting point with this question is that it
    asks for the percentage decline in sales to the
    nearest one hundredth of a percent.

    With sales of this size the statistical variation
    in sales from year to year when there is no change
    in the underlying mean number of sales is ~+/-1%.

    So everything after the decimal point in the percentage
    change is excessive precision.

    RonL
    Follow Math Help Forum on Facebook and Google+


/mathhelpforum @mathhelpforum