First, we can convert the percentage (6%) into a decimal. To do this, divide the percentage over 100.
6/100 = 0.06
Next, multiply the decimal (0.06) by the cost of the dinner which is $31.37.
0.06 × 31.37 = 1.88
Now, we know that the tax will add $1.88 to the dinner. Our last step is to add the tax onto the original price of the dinner.
$31.37 + $1.88 = $33.25
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To answer your question, the tax added $1.88 onto the original price of the dinner which made the overall cost $33.25.