Oscar Film City conducts special promotion activities every Tuesday. If the original ticket is 50 yuan, the audience will double on Tuesday, and the income will increase (1/2). How much is the price reduction for a ticket?
奥斯卡电影城每周二进行特价优惠活动，如果原来门票50元一张，周二观众增加2倍，收入增加(1/2)，问一张门票降价多少元？
<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">(3/2) / 3</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">50 * (1/2)</gadget>
<output>25</output>

<gadget id="calculator">50 - 25</gadget>
<output>25</output>

<result>25</result>