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If there is a 9.5% sales tax, you can just multiply 79.99 by 1.095 because you are paying 100% of 79.99 + 9.5% of 79.99. This can be written like the following:

(100%)*(79.99)+(9.5%)*(79.99) = (1)*(79.99)+(0.095)*(79.99) = (1+0.095)*(79.99) = (1.095)*(79.99) = 87.59

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13y ago

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