The cost of an article is decreased by $15 %$ . If the original cost is 80$, find the decrease cost.

68

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70

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75

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45

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Solution

The correct option is A $68$
Original cost $=$ 80$

Decrease in it $= 15 %$ of 80$

$= \frac{15}{100} \times 80$

$= \frac{1200}{100}$

$=$ 12$

$∴$ decrease in cost $=$ 80 - $12 =$ 68$

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