When Xiaoxiao walked from home to school (1/5), when she came home from school after school (2/7), did she walk faster to school or home from school? How much faster?
笑笑步行从家到学校用了(1/5)时，放学后从学校回家用了(2/7)时，她去学校走得快些还是从学校回家走得快些？快多少？
<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

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

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

<gadget id="calculator">(2/7) - (1/5)</gadget>
<output>3/35 = around 0.085714</output>

<result>3/35 = around 0.085714</result>