Question

what percentage of O2 is transported by RBC’s in the blood?

Answer 1

Although oxygen dissolves in blood, only a small amount of oxygen is transported this way. Only 1.5 percent of oxygen in the blood is dissolved directly into the blood itself. Most oxygen—98.5 percent—is bound to a protein called hemoglobin and carried to the tissues.

Answer 2

 97 to 98% of oxygen is transported by RBC