monocyte percentage of leukocytes (Experimental Factor Ontology entry EFO_0007989) is a calculated measurement in which the number of monocytes in a specified sample of blood is divided by the total number of white blood cells in the sample, and the result presented as a ratio, fraction, quotient or percentage. Also known as: blood monocyte count to total leukocyte count ratio, monocyte count as percentage of total white blood cells, monocyte count to total WBC count ratio, monocyte percentage, monocyte percentage of white cells.