what is the symbol for parts per thousand
Per mille A per mille[1][2][3] (from Latin per mÄ«lle, "in each thousand"[4]), also spelled per mil,[1][2][4][5][6][7][excessive citations] per mill,[4][5][6][7][8][9][excessive citations] permil,[4] permill,[4] or permille[3] is a sign indicating parts per thousand. Per mil should not be confused with parts per million (ppm).