A and B have a walking competition. A walks 3 kilometers in (2/5) hours, and B walks (9/2) kilometers in (3/4) hours. Whose speed is faster? What percentage of B's speed is A's speed?
甲、乙两个人进行步行比赛，甲(2/5)小时走了3千米，乙(3/4)小时走了(9/2)千米，谁的速度块？乙的速度是甲的速度的百分之几？
<gadget id="calculator">9 / 2</gadget>
<output>9/2 = around 4.5</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(9/2) / (3/4)</gadget>
<output>6</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">3 / (2/5)</gadget>
<output>15/2 = around 7.5</output>

<gadget id="calculator">6 / (15/2)</gadget>
<output>4/5 = around 0.8</output>

<result>4/5 = around 0.8</result>