What is the maximum true fraction whose unit of fraction is (1/5) converted into a percentage.
把分数单位是(1/5)的最大真分数化成百分数是多少．
<gadget id="calculator">5 / 1</gadget>
<output>5</output>

<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<result>4/5 = around 0.8</result>