18.5 discount
270% ,30%,240
39
4 120÷80%= 150, 150×90%= 135
5210 ÷ 70% = 300,300-210 = 90 (yuan)
665438+500,000 ÷ 3 million =50%
7 15%, 4000× (1+15%) = 4600 (kg)
86000+6000×2.89%×2=6346.8 (yuan)
9(2800-2000)×5%=40 (yuan)
Thanks for adoption