Among (21/25), 0.838, 83% and 0.83, what is the largest number.
在(21/25)、0.838、83%和0.83中，最大的数是多少．
<gadget id="calculator">21 / 25</gadget>
<output>21/25 = around 0.84</output>

<result>21/25 = around 0.84</result>