The water consumption in April is 2/7 less than that in March, and the water consumption in April is the same as in March.
四月份用水比三月份节约(2/7)，四月份用水是三月份的多少．
<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">1 - (2/7)</gadget>
<output>5/7 = around 0.714286</output>

<result>5/7 = around 0.714286</result>