There is a pile of coal with a water content of 14.5%. After a period of air drying, the water content drops to 10%. What is the quality of this pile of coal now?
有一堆含水量是14.5%的煤，经过一段时间风干后，含水量降为10%，现在这堆煤的质量是原来的多少．
<gadget id="calculator">14.5 / 100</gadget>
<output>0.145</output>

<gadget id="calculator">1 - 0.145</gadget>
<output>0.855</output>

<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 - (1/10)</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">0.855 / (9/10)</gadget>
<output>0.95</output>

<result>0.95</result>