What is the concentration of cacl2 in mass percent, Chemistry

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What is the concentration of cacl2 in mass percent

Can someone help me out with this question please,,, I am notgetting the right answer. I have tried answers 46.8, 45.6, 45.5%and it is marking it wrong :
An aqueous solution has a vapor pressure of 81.7mmHg at50C . The vapor pressure of pure water at this temperature is92.6mmHg. What is the concentration of CaCl2 in mass percent?

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Chemistry: What is the concentration of cacl2 in mass percent

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Chemistry: What is the concentration of cacl2 in mass percent

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