Water Quality Volumn

WQv=P x Rv x A/12…How come 10.7% isn’t converted to .107. The olny way I can come up with 14.6% is .05+.009(10.7) = .1463 = 14.6% and not .05 + .009(.107) = .05 = 5%. I’m not understanding the equation justifying not converting 10.7 to .107