You can put this solution on YOUR website! If the regular price is $83 and the sale price is $78.85 what is the discount rate
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1st: Find out the AMOUNT of discount: 83-78.85 = 4.15
2nd: Convert that amount to percent of the regular price: 4.15/83= 0.0488 or 4.88%
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Cheers,
Stan H.