The average yield of ordinary rice in an experimental field is 5.2 tons per hectare. After adopting the new technology, the average yield of rice is 6.5 tons per hectare. What percentage increase per hectare is the yield of new rice compared with ordinary rice?
某实验田普通水稻的平均产量是每公顷5.2吨，采用新技术后，水稻的平均产量为每公顷6.5吨，新水稻比普通水稻每公顷增产百分之几？
<gadget id="calculator">6.5 - 5.2</gadget>
<output>1.3</output>

<gadget id="calculator">1.3 / 5.2</gadget>
<output>0.25</output>

<result>0.25</result>