In 1-(9/14), "1" can be regarded as ((())/(())) to calculate, what is the difference.
1-(9/14)中，可以把"1"看成((())/(()))来计算，差是多少．
<gadget id="calculator">9 / 14</gadget>
<output>9/14 = around 0.642857</output>

<gadget id="calculator">1 - (9/14)</gadget>
<output>5/14 = around 0.357143</output>

<result>5/14 = around 0.357143</result>