A calculated measurement in which the number of neutrophil granulocytes is divided by the number of all white blood cells in a specified sample of peripheral venous blood, and the result presented as a ratio, fraction, quotient or percentage. A neutrophil is, or is in the process of becoming, a granular leucocyte having a nucleus with three to five lobes connected by threads of chromatin, cytoplasm containing very fine granules, and which is readily stainable with neutral dyes. The trait is neutrophil percentage of leukocytes (Experimental Factor Ontology identifier EFO_0007990). Also known as: blood neutrophil count to total leukocyte count ratio, neutrophil count as percentage of total white blood cells, neutrophil count to total WBC count ratio, neutrophil percentage, neutrophil percentage of white cells.