Someone interpret please....

Okay, I wasn't going to post today b/c I've been going post happy, but my husband made it so I HAD to! So last night we were at a friends house playing Wii golf. This is the part I need you to interpret. While playing G makes the statement, "80% of this game is 1/2 luck." We laughed for a good while at that one. And I'm suppose to be the one with baby brain.