If A alone takes 10 days to do a job, B takes 12 days, and C takes 15 days, what percentage of the job will be completed in one day by A, B, and C working together? What is the correct column
一项工作，若甲独做要10天，乙要12天，丙要15天，甲、乙、丙合作一天完成这项工作的几分之几？正确的列式是多少
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 / 12</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">1 / 15</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">(1/10) + (1/12) + (1/15)</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>