Scientists estimate that by 2025, the world's per capita water resources will be less than now (1/4), and the world's per capita water resources in 2025 will be the current level.
科学家估计到2025年，世界人均水资源比现在少(1/4)，2025年时世界人均水资源是现在的多少．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<result>3/4 = around 0.75</result>