Set variable in level blueprint

Development Programming & Scripting Blueprint
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6

it’s totally not what i asked for, my question was how to set (change,modify) variable in level blueprint from other blueprint

http://i.imgur.com/CuIUYKl.png

i increment my variable in here

http://i.imgur.com/gyTtOmh.png

and i want to decrement it in here

http://i.imgur.com/nAfi6dF.png