An engineering team wants to pave a road. The original plan is to pave 120 meters per day, which can be completed in 15 days. If the pavement needs to be completed 2.5 days ahead of schedule, how many percent will the road paved every day increase compared to the original plan?
某工程队要铺一条公路，原计划每天铺120米，15天可以完成，如果要提前2.5天铺完，那么每天铺的路比原计划增加百分之几？
<gadget id="calculator">120 * 15</gadget>
<output>1_800</output>

<gadget id="calculator">15 - 2.5</gadget>
<output>12.5</output>

<gadget id="calculator">1_800 / 12.5</gadget>
<output>144</output>

<gadget id="calculator">144 - 120</gadget>
<output>24</output>

<gadget id="calculator">24 / 120</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>