Among the numbers (17/20), 77%, 0.87, and (3/4), what is the closest number to (4/5).
在(17/20)、77%、0.87、(3/4)这些数中，最接近(4/5)的数是多少．
<gadget id="calculator">77 / 100</gadget>
<output>77/100 = around 0.77</output>

<result>77/100 = around 0.77</result>