Xiao Ming is shopping in the supermarket, the money on his body is spent (5/7), how much is left (fill in the score)
小明在超市买东西，身上的钱用去(5/7)，还剩下多少(填分数)
<gadget id="calculator">5 / 7</gadget>
<output>5/7 = around 0.714286</output>

<gadget id="calculator">1 - (5/7)</gadget>
<output>2/7 = around 0.285714</output>

<result>2/7 = around 0.285714</result>