The container is filled with 1,000 ml of alcohol with a volume fraction of 15%, and now 100 ml and 400 ml of alcohol A and B are respectively poured in. At this time, the volume fraction of alcohol in the container is 14%. The volume fraction of alcohol is twice that of type B alcohol, find the volume fraction of type A alcohol. (Note: volume fraction = ((solute volume)/(solution volume)))
容器里装有体积分数为15%的酒精1,000毫升，现在又分别倒入100毫升和400毫升的甲、乙两种酒精，此时容器里的酒精的体积分数为14%，已知甲种酒精的体积分数是乙种酒精的2倍，求甲种酒精的体积分数．(注：体积分数=((溶质体积)/(溶液体积)))
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>