Out of 100 attendees, 100 x 50/100 = <<100*50/100=50>>50 are women.
While 100 x 35/100 = <<100*35/100=35>>35 are men.
So there were a total of 50 + 35 = <<50+35=85>>85 men and women who attended the party.
Thus, 100 - 85 = <<100-85=15>>15 children attended the party.
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