(1/4) of a water diversion project was completed in February, and (2/7) was completed in March. What percentage of this project was completed in March than in February?
二月份完成了一项引水工程的(1/4)，三月份完成了(2/7)，三月比二月多完成这项工程的几分之几？
<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

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

<gadget id="calculator">(2/7) - (1/4)</gadget>
<output>1/28 = around 0.035714</output>

<result>1/28 = around 0.035714</result>