[질문] 성적등급별퍼센트좀알려주세요. ex)1등급:4%

1등급-상위4%/2등급-상위7%/3등급-상위12%/4등급-상위17%/5등급-상위20%/6등급-하위17%/7등급-하위12%/8등급-하위7%/9등급-하위4%