A stereo is marked with the price of $479. The sales tax is $28.74. What is the...

sales tax = price * rate (in decimal form)

So, to find the rate, you would divide both sides by the price:
rate (in decimal form) = sales tax/price
rate = 28.74/479 = .06

Convert the rate into a percentage by multiplying your answer by 100.
Rate = 6%
 
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