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?
Choose the most appropriate option:  A) 0.002%  B) 0.02%  C) 0.2%  D) 2%  E) 20%
In 20 days 20*0.01= 
<gadget id="calculator">20*0.01</gadget>
<output>0.2</output>
0.2 ounces of water evaporated, which is 0.2/10∗100=2 of the original amount of water.   Answer: 2%.
<result>D</result>
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?