Uncle Li uses 1/6 of his salary for daily expenses every month, 1/7 of his salary is used to support students in poor mountainous areas, and the rest is saved. How much of your salary is saved?
李叔叔每个月将工资的(1/6)做日常开支，工资的(1/7)用来资助贫困山区的学生，余下来的存起来．存起来的钱占工资的几分之几？
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 / 7</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">(1/6) + (1/7)</gadget>
<output>13/42 = around 0.309524</output>

<gadget id="calculator">1 - (13/42)</gadget>
<output>29/42 = around 0.690476</output>

<result>29/42 = around 0.690476</result>