An elementary irreversible liquid-phase reaction, 2A → B, is carried out under isothermal conditions in a 1 m³ ideal plug flow reactor (PFR) as shown in the figure. The volumetric flow rate of fresh A, v = 10 m³ h⁻¹, and its concentration C_A = 2 kmol m⁻³. For a recycle ratio R = 0, the conversion of A at location 2 with respect to the fresh feed (location 1) is 50%. For R → ∞, the corresponding conversion of A is _________% (rounded off to one decimal place).