From a tank containing $100$ liters of chemical, $20$ liters is drawn out and replaced with water. This process is repeated one more time. What is the percentage of the original chemical remaining in the tank?

Options:

• A: $64%$
• B: $60%$
• C: $68%$
• D: $72%$

Related Practice Questions:

• Which of the following artifacts, extensively found at Burzahom and Gufkral, specifically indicates that the Neolithic inhabitants of Kashmir practiced sewing animal skins for clothing to survive the harsh winters?
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• The first human colonization of the fertile Ganga plains, as evidenced by archaeological discoveries at Sarai Nahar Rai and Mahadaha, took place during which period?
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