[SOLVED] Possible?

I bought a rabbit backpack( 10%+ exp up) and 50% + exp item. Is it 60% now or when i wear the backpack its 10% instead of 50?

I always thought they add up but then again I never knew .

It doesn't seem to add up for me. I had a score of 6-1 in S-D Match and only got 100~ from the game.