Hongxing Village plans to build a 3,000-meter canal in 15 days, and actually builds 250 meters a day. By what percentage is the actual work efficiency improved compared to the original plan?
红星村计划15天修一条长3000米的水渠，实际每天修250米．实际工效比原计划工效提高了百分之几？
<gadget id="calculator">3_000 / 15</gadget>
<output>200</output>

<gadget id="calculator">250 - 200</gadget>
<output>50</output>

<gadget id="calculator">50 / 200</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>