discount means a deduction from the regular price of something
Formula for getting the discount:
discounted price = regular price minus (% off multiplied by the regular price)
Example:
30% off of $100
= 30% discount applied to $100
= $100 - (30% * $100)
= $100 - (0.30 * $100)
= $100 - $30
= $70
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Percents are used to calculate tax on EVERY store purchase,and to calculate discounts on every "special" or "bargain".If you can't calculate percents, you can't catch mistakes or avoid being cheated.
No, they are not.
28%
12.8 = 1,280%
1.4 = 140%