Counter with total attempts

I need a counter to record the amount of correct answers compared to the amount of attempts. So making it look like 2/5, for example. Meaning two correct answers out of 5 attempts.
I have been able to set it up so it knows when the answer is correct and everything, just can't figure the counter out.
I tried to add the global successCounter and global attemptsCounter together but that doesn't work in the way I need

Thank you! Have fixed that now.
Any ideas on the counter?

Is this do not work after doing that

The general formula for incrementing a counter is

set counter to counter + 1