The ticket price for a football game is 80 yuan, and there are still tickets left one hour before the game, so the price is reduced. As a result, the number of tickets sold increases by one-third, while the box office revenue increases by one-fourth, so how much is the price of each ticket reduced? ?
足球比赛票价80元，赛前一小时还有余票，于是决定降价，结果售出的票增加三分之一，而票房收入增加了四分之一，那么每张票售价降了多少元？
<gadget id="calculator">4 / 3</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">(4/3) * 80</gadget>
<output>320/3 = around 106.666667</output>

<gadget id="calculator">5 / 4</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">(5/4) * 80</gadget>
<output>100</output>

<gadget id="calculator">(320/3) - 100</gadget>
<output>20/3 = around 6.666667</output>

<gadget id="calculator">(20/3) / (4/3)</gadget>
<output>5</output>

<result>5</result>