8-x 16-100% 800=16x -16x=-800|:(-16) x=50(%) 800-100% 8-x 800x=800|:800 x=1% 8000-100% 8-x 8000x=800|:8000 x=0,1% 0,8-100% 8-x 0,8x=800|:0,8 x=1000%