In the library of Chunlei Primary School, literature and art books account for (1/4), natural science books account for (3/8), and social science books account for (3/10). How much more literature and art and natural science books than social science books?
春蕾小学图书室文艺类图书占(1/4)，自然科学类图书占(3/8)，社会科学类图书占(3/10)．文艺类和自然科学类图书比社会科学类图书多占几分之几？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">(3/8) - (3/10)</gadget>
<output>3/40 = around 0.075</output>

<gadget id="calculator">(1/4) + (3/40)</gadget>
<output>13/40 = around 0.325</output>

<result>13/40 = around 0.325</result>