Calculating Sales TaxDate: 09/19/2001 at 12:03:35 From: Jason Subject: Sales Tax How do I calculate sales tax? Please describe the steps. Date: 09/19/2001 at 15:30:08 From: Doctor Ian Subject: Re: Sales Tax Hi Jason, First, you have to know the tax rate -- for example, 5 1/4 percent. The idea is that for each 100 units that you spend, you have to pay 5 1/4 units in tax. So the ratio tax 5 1/4 ----- = ----- price 100 You can multiply both sides of the equation by price to get 5 1/4 tax = ------ * price 100 which is how you compute the tax. Note that this is the same as dividing the price into 100 parts, and paying an amount equal to 5 1/4 of those parts in tax: tax = (price / 100) * 5 1/4 Does this help? - Doctor Ian, The Math Forum http://mathforum.org/dr.math/ |
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