Using the formulas, F = (9/5)C + 32 and K = C + 273, convert 68o Fahrenheit to Kelvin. Power Engineering Using the formulas, F = (9/5)C + 32 and K = C + 273, convert 68o Fahrenheit to Kelvin. A. 0 K B. 20 K C. 32 K D. 273 K E. 293 K. Answer: E Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+