Answer
The percentage deviation is $~~0.032~\%$
Work Step by Step
We can find the percentage deviation:
$\frac{M_{app}-M}{M}~\times 100\%$
$= \frac{A~m_p-1.007 825~u}{1.007 825~u}~\times 100\%$
$= \frac{(1)(1.673\times 10^{-27}~kg)-(1.007 825)(1.660538782\times 10^{-27}~kg)}{(1.007 825)(1.660538782\times 10^{-27}~kg)}~\times 100\%$
$= 0.032~\%$
The percentage deviation is $~~0.032~\%$