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To calculate tax, you multiply your base price (40 in this case) times (percent/100) so:

40*0.0775 = 3.1. Now, you add this to your original:

40+3.02=43.1. A shortcut:

40*1.0775=43.1.

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11y ago
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Q: How much is 40 plus tax 7.75 percent?
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