Each football ticket is several yuan. If the price of each ticket is reduced by 5 yuan, the audience can increase (1/2) compared to the original, so that the ticket revenue will increase by 20% compared to the original. What is the original price of each ticket?
足球票每张若干元，如果每张降价5元后，观众可比原来增加(1/2)，这样门票收入比原来增加20%，原来每张票价是多少元．
<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">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">1 - (4/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">5 / (1/5)</gadget>
<output>25</output>

<result>25</result>