The original price of football tickets was 50 yuan a piece. In order to attract the audience and promote fitness for all, the sponsor decided to sell the tickets at a reduced price. After the results were reduced, the audience increased by half, and the income increased by one-fifth. Please do the math, how much has the price of each ticket been reduced?
足球门票原价50元一张，为了吸引观众，同时为了倡导全民健身运动，主办单位决定降价出售．结果降低后观众增加了一半，收入也增加了五分之一．请你算一算，每张门票降价了多少元？
<gadget id="calculator">1 / 5</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">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 + (1/2)</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">(6/5) / (3/2)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(4/5) * 50</gadget>
<output>40</output>

<gadget id="calculator">50 - 40</gadget>
<output>10</output>

<result>10</result>