A manuscript needs to be typed in 10 hours, and B needs to be typed in 15 hours. How much faster is A's speed than B?
一部书稿，甲要10小时打完，乙要15小时打完，甲的速度比乙快百分之几？
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

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

<gadget id="calculator">(1/10) - (1/15)</gadget>
<output>1/30 = around 0.033333</output>

<gadget id="calculator">(1/30) / (1/15)</gadget>
<output>1/2 = around 0.5</output>

<result>1/2 = around 0.5</result>