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telo118 [61]
3 years ago
14

If a pair of jeans cost 45 dollars before the sale and the sale is taking 9 dollars off of the original price what was the perce

nt taken off?
Mathematics
1 answer:
Dvinal [7]3 years ago
3 0

Answer:

20%

Step-by-step explanation:

A pair of jeans cost $45  before the sale.

The sale is taking $9 off of the original price.

Then

$45 - 100%

$9 - x%

Write a proportion:

\dfrac{45}{9}=\dfrac{100}{x}

Cross multiply:

45\cdot x=9\cdot 100\\ \\45x=900\\ \\x=\dfrac{900}{45}\\ \\x=20\%

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3 years ago
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Learn more about rule of descartes here:

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