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Re: Math Formula Question - Need Ideas

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On 1/5/2014 12:56 PM, Allodoxaphobia wrote:
> On Sat, 04 Jan 2014 19:33:31 -0500, Richard Damon wrote:
>> On 1/4/14, 7:26 PM, Adrienne Boswell wrote:
>>> I have a math question to which I can't find the answer.  Here is the
>>> scenario:
>>>
>>> Someone goes to a store and has $100.00 worth of items.  The merchant
>>> gives the customer a 10% discount, so only $90.00 is sent to the bank.
>>> Of the original amount, $10.00 goes to the customer for the discount,
>>> $80.00 goes to the merchant, $10.00 goes for a processing fee.  But those
>>> amounts have to be calced on the original amount, not what the bank got.
>>> I need a formula to find the original amount if I have the percentage
>>> (10%) and the amount the bank got ($90.00).  I know in my head that the
>>> original amount is $100.00, but I have to do it programatically.
>>>
>>> I know this is probably dead simple, but I just can't get my head around
>>> it.
>>>
>>> Thanks in advance.
>>>
>> 10%  is 0.1
>>
>> You got the $90 by multiplying the original $100 by (1-0.1) to get $90,
>> so you can divide the $90 by (1 - 0.1) to get the original $100
>
> Then, state and local taxes are usually calc'd on the original price,
> not the discounted price.
>

Incorrect.  State and local taxes are calculated on the actual 
(discounted) selling price.

At least that's so in the United States.

-- 
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex@attglobal.net
==================

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Thread

Math Formula Question - Need Ideas Adrienne Boswell <arbpen@yahoo.com> - 2014-01-05 00:26 +0000
  Re: Math Formula Question - Need Ideas Richard Damon <Richard@Damon-Family.org> - 2014-01-04 19:33 -0500
    Re: Math Formula Question - Need Ideas Allodoxaphobia <knock_yourself_out@example.net> - 2014-01-05 17:56 +0000
      Re: Math Formula Question - Need Ideas Jerry Stuckle <jstucklex@attglobal.net> - 2014-01-05 13:15 -0500
        Re: Math Formula Question - Need Ideas John Smith <johnsmithjsm@live.com> - 2014-01-07 14:57 +0000
  Re: Math Formula Question - Need Ideas The Natural Philosopher <tnp@invalid.invalid> - 2014-01-05 00:37 +0000
    Re: Math Formula Question - Need Ideas Jerry Stuckle <jstucklex@attglobal.net> - 2014-01-04 20:20 -0500
  Re: Math Formula Question - Need Ideas Denis McMahon <denismfmcmahon@gmail.com> - 2014-01-05 00:54 +0000
    Re: Math Formula Question - Need Ideas Jerry Stuckle <jstucklex@attglobal.net> - 2014-01-04 20:22 -0500
      Re: Math Formula Question - Need Ideas Denis McMahon <denismfmcmahon@gmail.com> - 2014-01-05 16:40 +0000
        Re: Math Formula Question - Need Ideas Jerry Stuckle <jstucklex@attglobal.net> - 2014-01-05 13:16 -0500
          Re: Math Formula Question - Need Ideas Adrienne Boswell <arbpen@yahoo.com> - 2014-01-05 23:09 +0000
  Re: Math Formula Question - Need Ideas Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2014-01-05 18:53 +0100
    Re: Math Formula Question - Need Ideas Adrienne Boswell <arbpen@yahoo.com> - 2014-01-05 22:56 +0000
      Re: Math Formula Question - Need Ideas Jerry Stuckle <jstucklex@attglobal.net> - 2014-01-05 18:11 -0500
      Re: Math Formula Question - Need Ideas Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2014-01-06 20:47 +0100

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