Question

A glass was filled with $10$ ounces of water, and $0.01$ ounce of the water evaporated each day during a $20$-day period. What percent of the original amount of water evaporated during this period?

• A. $0.002\%$
• B. $0.02\%$
• C. $0.2\%$
• D. $2\%$
• E. $20\%$

Answer 1

The correct option is D $2\%$

Given that 0.01 ounce of water evaporates every day

So, In 20 days $20\times 0.01=0.2$ ounces of water evaporated.

% of water evaporated = $\frac{0.2}{10}\times 100=2\%$

So, correct answer will be option D.