A chemical fertilizer factory completed (3/5) of the production tasks in the first quarter in January and February this year, completed 75% of the production tasks in the first quarter in February and March, and completed the production tasks in the first quarter in February.
某化肥厂，今年一、二月份完成了第一季度生产任务的(3/5)，二、三月份完成了第一季度生产任务的75%，二月份完成了第一季度生产任务的多少．
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">75 / 100</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(3/4) - 1</gadget>
<output>-1/4 = around -0.25</output>

<gadget id="calculator">(3/5) + (-1/4)</gadget>
<output>7/20 = around 0.35</output>

<result>7/20 = around 0.35</result>