There were 225 people who attended the party.
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4/5 of the attendees were employee:
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![\dfrac{4}{5} \times 225 = 180](https://tex.z-dn.net/?f=%20%5Cdfrac%7B4%7D%7B5%7D%20%5Ctimes%20225%20%3D%20180)
There were 180 employees.
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2/3 of the employees were engineers:
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![\text {Fraction of non-engineers = } 1 - \dfrac{2}{3} = \dfrac{1}{3}](https://tex.z-dn.net/?f=%5Ctext%20%7BFraction%20of%20non-engineers%20%3D%20%7D%201%20-%20%20%5Cdfrac%7B2%7D%7B3%7D%20%20%3D%20%20%5Cdfrac%7B1%7D%7B3%7D%20)
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Number of Non-engineers :
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![\text { number of non-engineers = } \dfrac{1}{3} \times 180 = 60](https://tex.z-dn.net/?f=%5Ctext%20%7B%20number%20of%20non-engineers%20%3D%20%7D%20%20%5Cdfrac%7B1%7D%7B3%7D%20%5Ctimes%20180%20%3D%2060)
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Answer: There were 60 non-engineers employees that attended the party.----------------------------------------------------------------------------------------------------