nsize=`stat -c %s "$ffile"`
#   let "ssize = ${osize} - ${nsize}"
#   let "psize = ${ssize} / ${osize} * 100"
    ssize = $((${osize} - ${nsize}))
    psize = $((${ssize} / ${osize} * 100))
    echo "  Was ${osize} bytes, now ${nsize} bytes"
    echo "  Saved ${ssize} bytes (${psize} %)"
----
  Was 24046035 bytes, now 23817149 bytes
  Saved  bytes (0 %)