A project can be completed in 8 days by A alone, 10 days by B alone, and 1.5 days by the cooperation of the two teams. What fraction of the whole project is left?
一项工程，甲单独做要8天完成，乙单独做要10天完成，两队合作1.5天，还剩下全工程的几分之几？
<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

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

<gadget id="calculator">(1/8) + (1/10)</gadget>
<output>9/40 = around 0.225</output>

<gadget id="calculator">(9/40) * 1.5</gadget>
<output>0.3375</output>

<gadget id="calculator">1 - 0.3375</gadget>
<output>0.6625</output>

<result>0.6625</result>