$\"\"$

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What is $\"\"$ ? (Write the question)

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$\"\"$ (Write percent equation)

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$\"\"$ (Substitute $\"\"$ for p and 90 for b)

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$\"\"$ (Substitute $\"\"$ for k)

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$\"\"$ (Subtract: $\"\"$ )

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$\"\"$ (Write percent as decimal)

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$\"\"$ (Multiply: $\"\"$ ) $\"\"$

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$\"\"$ $\"\"$ is the solution.

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