A and B produce the same number of parts. When A completes 40% of his work, B completes (1/3), and the remaining A's work efficiency increases by 20%. If A and B complete at the same time, B's work efficiency increases by 100%. Several?
甲乙二人生产同样多的零件，当甲完成自己的40%时，乙完成了(1/3)，余下的甲的工效提高20%，要使甲乙同时完成，乙的工效应提高百分之几？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (1/3)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">6 * (6/5)</gadget>
<output>36/5 = around 7.2</output>

<gadget id="calculator">(3/5) / (36/5)</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">(2/3) / (1/12)</gadget>
<output>8</output>

<gadget id="calculator">8 - 5</gadget>
<output>3</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<result>3/5 = around 0.6</result>