The number of story books in the school library is 15% less than that of science books. What percentage of story books are science books?
学校图书室的故事书比科技书少15%，故事书是科技书的百分之几？
<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">1 - (3/20)</gadget>
<output>17/20 = around 0.85</output>

<result>17/20 = around 0.85</result>