People in a certain school (9/10) subscribe to the "Mathematics Journal", among which the number of people in the lower grades (4/5) and the number of people in the middle and high grades (15/16) subscribe to the newspaper, and the number of people in the lower grades is the number of people in the middle and high grades What fraction of?
某学校(9/10)的人订《数学报》，其中低年级人数的(4/5)和中、高年级人数的(15/16)订了报纸，低年级人数是中、高年级人数的几分之几？
<gadget id="calculator">15 / 16</gadget>
<output>15/16 = around 0.9375</output>

<gadget id="calculator">9 / 10</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">(15/16) - (9/10)</gadget>
<output>3/80 = around 0.0375</output>

<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(15/16) - (4/5)</gadget>
<output>11/80 = around 0.1375</output>

<gadget id="calculator">(3/80) / (11/80)</gadget>
<output>3/11 = around 0.272727</output>

<gadget id="calculator">1 - (3/11)</gadget>
<output>8/11 = around 0.727273</output>

<gadget id="calculator">(3/80) / (11/80) / (8/11)</gadget>
<output>3/8 = around 0.375</output>

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