Answer
$\Delta P=0.019atm$
Work Step by Step
We know that,
$\Delta P={\rho}gh$
We plug in the known values to obtain:
$\Delta P=998\times 9.8\times 0.20$
$\Delta P=1956.08Pa$
$\Delta P=\frac{1956.08}{1.01\times 10^5}$
$\Delta P=0.019atm$