If a 3G mobile phone is sold at a price rate of 25%; if it is sold at a 10% discount, the daily sales volume will increase by 50%, what percentage of the original total profit after the discount?
一款3G手机，如果按定价出售利率是25%；如果打九折出售，每天销量增加50%，打折后的总利润是原来的百分之几？
<gadget id="calculator">75 / 100</gadget>
<output>3/4 = around 0.75</output>

<result>3/4 = around 0.75</result>