A pile of coal weighs (11/12) tons, use (1/4) on the first day, use (3/8) on the second day, use up all the rest on the third day, and use this on the third day What fraction of the pile of coal?
一堆煤重(11/12)吨，第一天用去(1/4)，第二天用去(3/8)，第三天把剩下的全都用完，第三天用去这堆煤的几分之几？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">1 - (1/4) - (3/8)</gadget>
<output>3/8 = around 0.375</output>

<result>3/8 = around 0.375</result>