Arrange the four numbers 9.7%, (4/5), 0.85, and (17/20) in ascending order, what is the number that ranks first.
把9.7%、(4/5)、0.85、(17/20)这四个数按从小到大的顺序排列，排在第一位的是多少．
<gadget id="calculator">9.7 / 100</gadget>
<output>0.097</output>

<result>0.097</result>