In (1/2), (3/4), (7/9), what is the fraction with the smallest fraction unit
在(1/2)、(3/4)、(7/9)中，分数单位最小的分数是多少
<gadget id="calculator">9 / 1</gadget>
<output>9</output>

<gadget id="calculator">7 / 9</gadget>
<output>7/9 = around 0.777778</output>

<result>7/9 = around 0.777778</result>