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29 July, 05:33

John paid $32.16 for groceries this included the 7% sales tax what was the cost of groceries before the sales tax

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  1. 29 July, 05:49
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    The answer is $30.06.

    John added 7% of tax to the price before tax which is 100%. So, the price John paid is 107%. If $32.16 is 107%, how many $ is 100% (the price before tax):

    $32.16 : 107% = x : 100%

    After crossing the products:

    x · 107% = $32.16 · 100%

    ⇒ x = $32.16 · 100% : 107% = $30.06

    Therefore, the cost of groceries before the sales tax is $30.06.
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