Answer
$\frac{49}{200}$
Work Step by Step
As seen in the pie chart, the section labelled groundwater is the only remaining piece. This means that the whole (1) `minus the other two pieces will result in the fractional value of groundwater.
1 - (fraction of icebergs and glaciers + fraction of active water) =
$1 - (\frac{3}{4} + \frac{1}{200})= 1-(\frac{151}{200}) = \frac{49}{200}$
