DJMAX RESPECT V

This achievement requires you to reach 80% of the "Master Score" for either 4B, 5B, 6B or 8B, which you can see in the Ranking leaderboards or in your Collection. While it probably doesn't need to be said, playing through every song on 4B is much easier than the other 3 buttons, so new players should stick to that unless they want to challenge themselves and learn 5B/6B/8B, which would come in handy for doing a lot of the missions later on.

The term "Master Score %" seen in-game is sort of misleading, as the actual percentage has nothing to do with your total score for that button *or* the average rate percentage. Instead, it seems to be calculated based on the number of songs you have S ranked and the number of songs you have achieved a Max Combo on. While this may be inaccurate, from what I've been able to tell it's split evenly between them, so you can get up to 50% getting S ranks (which are obtained by getting a rate of 97% or higher for each chart) and you get the other 50% by getting Max Combos. Also from what I've been able to tell, getting an A, B or C rank will still count a little toward the S rank part of the percentage, just not as much as a full S rank.

While they haven't been added yet as of writing this guide, based on the Steam version of the game reaching 100% of the "Master Score" does not include DLC songs (although it does include free songs added to the base game as part of seasonal updates). Instead, DLC songs will actually add to your "Master Score %" past 100%, allowing you to go all the way over 300% with the currently released DLCs. This means that should you want to get this achievement without needing to S rank/Max Combo the more difficult MX/SC charts, buying DLC songs will make this achievement much easier.

So easy with DLC most people wouldn't need

What i just saw is changing 3 A score to S and not changing a single number in percentage, and some music has different score than others, just see those "perfect score" videos and compare then

Did mostly S Max Score up to 14 Stars: you have to play SC, and they are tough so to try a lot to not go game over to some SC11 stars impossibe ones,

So I gone by Online Open match lol: you don't fail and will just mash those for the remaining score.

Going full base game:
i like the game, but didn't like to play some songs, and you have to do it a hundred of times on Hard and Maximum, going for S Max Score, didn't feel for buy a pack and like it would be different, don't worth for me