The school organized an excursion in the summer camp, originally planned to cover 11.25km in 3 hours. The actual journey was completed in 2.5 hours. How many kilometers per hour did you actually walk more than originally planned?
学校夏令营组织远足，原计划3小时走完11.25km．实际2.5小时就走完了原定路程．实际比原计划每小时多走多少千米？
<gadget id="calculator">11.25 / 2.5</gadget>
<output>4.5</output>

<gadget id="calculator">11.25 / 3</gadget>
<output>3.75</output>

<gadget id="calculator">4.5 - 3.75</gadget>
<output>0.75</output>

<result>0.75</result>