How Can I Isolate Pna/Pk in This Equation for Calculator Use?

[moazad655]

if a brilliant mind could reduce this equation in such way that P_na/P_k stand alone and can be solved on a calculator, I would be forever grateful. The equation goes as follows

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[mfb]

Assuming that notation means the products of P_K and P_Na with something else: divide both numerator and denominator by P_K, modify your equation to get rid of the log and then solve for your ratio.