0.5/2.6*100%=19.23%降价了19.23%
降价了百分之19.230.5÷2.6×100%=19.23%
0.5÷2.6x100%=0.1923x100%=19.23%谢谢，请采纳
0.5/2.6 x100%=19.23%
0.5÷2.6≈0.192=19.2％
