Zhanqi School originally planned to use 400 kilograms of coal per day, but actually used 300 kilograms of coal per day. How much less was the actual daily coal consumption than the original plan?
战旗学校原计划每天用煤400千克，实际每天用煤300千克，实际每天用煤量比原计划每天用煤量少百分之几？
<gadget id="calculator">100 / 400</gadget>
<output>1/4 = around 0.25</output>

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