A project is completed in 8 days by the cooperation of A, B, and C. Now A and B will work together for 1 day, and the rest will be completed by C alone in 15 days. Find the work efficiency of C.
一项工程，甲乙丙三人合做8天完成．现由甲乙合做1天后，剩下的由丙独做15天完成．求丙的工作效率．
<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">1 - (1/8)</gadget>
<output>7/8 = around 0.875</output>

<gadget id="calculator">(7/8) / 14</gadget>
<output>1/16 = around 0.0625</output>

<result>1/16 = around 0.0625</result>