I am trying to capture the total used memory in % on remote machine as the following

```
 sshpass -p pasa123 ssh root@server01 "  /usr/bin/free | awk '/Mem/{printf("RAM Usage: %.2f%\n"), $3/$2*100}' "
awk: cmd. line:1: /Mem/{printf(RAM Usage: %.2f%n), /*100}
awk: cmd. line:1:                       ^ syntax error
awk: cmd. line:1: /Mem/{printf(RAM Usage: %.2f%n), /*100}
awk: cmd. line:1:                                ^ syntax error
awk: cmd. line:1: /Mem/{printf(RAM Usage: %.2f%n), /*100}
awk: cmd. line:1:                                   ^ unterminated regexp
awk: cmd. line:1: /Mem/{printf(RAM Usage: %.2f%n), /*100}
awk: cmd. line:1:                                        ^ unexpected newline or end of string

```

so we add backslash as before the "$" as

```
 sshpass -p pasa123 ssh root@server01 "  /usr/bin/free | awk '/Mem/{printf("RAM Usage: %.2f%\n"), \$3/\$2*100}' "

```

but still with the same errors

any advice how to fix this syntax?