\begin{figure}[!t]
\centering
- \subfloat[Energy saving]{%
+ \subfloat[Energy saving (\%)]{%
\includegraphics[width=.33\textwidth]{fig/energy}\label{fig:energy}}%
- \subfloat[Performance degradation ]{%
+ \subfloat[Performance degradation (\%)]{%
\includegraphics[width=.33\textwidth]{fig/per_deg}\label{fig:per_deg}}
\label{fig:avg}
\caption{The energy and performance for all NAS benchmarks running with a different number of nodes}