Lvjing Farm planned to reforest 8 hectares last year, but actually reforested 12 hectares. How many percent more than the original plan?
绿景农场去年计划造林8公顷，实际造林12公顷，实际比原计划多造林百分之几？
<gadget id="calculator">12 - 8</gadget>
<output>4</output>

<gadget id="calculator">4 / 8</gadget>
<output>1/2 = around 0.5</output>

<result>1/2 = around 0.5</result>