Guild Wars 2

See how only one of the effects is blue, and the information says 1/2?

It means you only have one armor piece with that rune on it.

If you get another and put it on a second piece of armor it will read 2(2)

It means you only have 1 Minor Rune of Rage in your equipped gear. If you put one on another piece of gear, you’d have 2/2 and get both bonuses. Higher end ones go up to 6 in a set and you need the same one on each armor piece to get the full benefit.