After 38 liters of petrol were poured into the tank, it was still 5% empty. How much petrol must be poured into the tank in order to fill it?  Pick one
A) 7 liters B) 9 liters C) 5 liters D) 2 liters E) 2 liters
Explanation:   95% ----------- 38   5% ------------ ? =&gt; 2 liters   Answer: 2 liters
<result>D</result>
After 38 liters of petrol were poured into the tank, it was still 5% empty. How much petrol must be poured into the tank in order to fill it?