Answer:
Explanation:
To calculate the 18% discount, convert 18% into the equivalent decimal fraction 0.18 and then multiply the regular price ($20) by 0.18; the discount is thus $3.60.
Subtract the discount, $3.60, from the regular price ($20) to obtain the discount price: $16.40.
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Alternatively, take the shortcut of multiplying $20 by (1.00 - 0.18), or
$20 by 0.82. The result (i. e., the discount price) is the same: $16.40