Percentage Macro

I'm trying to make a macro that uses a percentage of the target HP and add it to the damage of the weapon. What am I missing here? [[floor((25/100*[[@{target|hp|max}]][25% of Max HP]) + 1d8 + 7)]] I tried it several ways (e.g. using 0.25 instead of 25/100) and so on. 

When you're grabbing the 'max' value of an Attribute with a target call, you need to supply a target label. It's a good idea to use them all the time anyway - avoid issues  like this and it can make your macros easier to use. This: [[floor(0.25*@{target|foe|hp|max})[25% HP] + 1d8 + 7]] should do the trick. edit - or, once you're happy it's working how you want it, if you want to pretty up the tooltip you can wrap the floor calculation in another set of squackets: [[[[floor(0.25*@{target|foe|hp|max})]][25% HP] + 1d8 + 7]]

Thanks a lot, it worked really well