A certain distance, A takes 20 minutes to complete the journey, and B takes 15 minutes to complete the journey, what percentage of A's speed is B's speed?
一段路，甲走完全程需20分钟，乙走完全成需15分钟，甲的速度是乙速度的百分之几？
<gadget id="calculator">1 / 20</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">1 / 15</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">(1/20) / (1/15)</gadget>
<output>3/4 = around 0.75</output>

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