KöMaL 2020 K675
A large company was giving a Christmas party to its employees. Some of them brought their spouses along. There were five times as many men present at the party as women. At 10 p.m., some husbands left for home with their wives, and thus the number of women dropped to one seventh of the number of men remaining. What fraction of the men left at 10 p.m.?
Official text KöMaL. Quoted with source.
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