There are fewer story books (1/4) than science books, and how many story books are science books.
故事书比科技书少(1/4)，故事书是科技书的多少．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<result>3/4 = around 0.75</result>