YOU SAID:

I could 100 percent this song

INTO JAPANESE

私はこの歌を100パーセントすることができました

BACK INTO ENGLISH

i was able to do this song 100%

INTO JAPANESE

この曲は100%できました

BACK INTO ENGLISH

This song is 100% done

INTO JAPANESE

この曲は 100% 完成しました

BACK INTO ENGLISH

This song is 100% complete

INTO JAPANESE

この曲は完成度100%

BACK INTO ENGLISH

This song is 100% complete