KöMaL 2010 K243
Grandma makes muffins with two kinds of filling for her grandchildren: jam and cheese. One time, 40% of the muffins she made were filled with jam. Another time she made 10% more with jam filling and 5% less with cheese filling. By what percentage did the number of all muffins change?
Official text KöMaL. Quoted with source.
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