Xinhua Bookstore has more children's books than adult books (1/4), so how many percent are adult books less than children's books?
新华书店儿童读物比成人用书多(1/4)，那么成人用书比儿童读物少百分之几？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 + (1/4)</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">(1/4) / (5/4)</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>