Aunt Wang bought a bag of rice weighing 30 kilograms. She ate 3 kilograms on the first day and some more on the second day. There was still 80% of the rice in the bag. How much of the rice has been eaten?
王阿姨买了一包大米重30千克，第一天吃了3千克，第二天又吃了一些，还剩下这包大米的80%，已经吃了这包大米的多少
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 - (4/5)</gadget>
<output>1/5 = around 0.2</output>

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