optimized function

gaboshlib/g_percentage-diff.bashfunc

@@ -3,6 +3,5 @@
 function g_percentage-diff {
   local g_from=$1
   local g_to=$2
-  local g_diff=$(echo "scale=8; $g_to-$g_from" | bc | sed 's/^\./0./; s/^-\./-0./')
-  echo "scale=8; 100/$g_from*$g_diff" | bc | sed 's/^\./0./; s/^-\./-0./' | xargs printf "%.2f"
+  echo "scale=2; 100/$g_from*($g_to-$g_from)" | bc | sed 's/^\./0./; s/^-\./-0./' | xargs printf "%.2f"
 }