【angela tsai】評論
80/50*100%=160%60/50*100%=120%........
【機械】評論
四樓以100%為基準100%/50=X/55 => X=55*100%/50 = 110%100%/50=X/60 => X=60*100%/50 = 120%100%/50=X/80 => X=80*100%/50 = 160%