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I need suggestions for creating a formula to give percentage rate if i know the sub total paid and what the

 
 

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1.I need suggestions for creating a formula to give percentage Rate if I know the sub-total paid and what the ...

hat the actual tax paid. (See example: http://www.csgnetwork.com/salestaxpercentcalc.html ) If I know my subtotal is: $27.99 And my Tax Amount is:: $1.96 How can I know that the Tax RATE is: 7.00 ?
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1.AU MAT 120 Systems of Linear Equations and Inequalities Discussion

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