г (%)
1. :
(120 - 100): 100 100% = 20%
2. .
) ,
1- 3,0 × 100 = 300 ( 1, 2)
2- - 3,0 × 120 = 360 ( 1, 2)
) ( )
1- : 1 2,0 × 100 + 20 = 220
2 1,2 × 100 + 80 = 200
2- : 1 2,0 × 120 + 20 = 260
2 1,2 × 120 + 80 = 224
) ,
1- : 1 300 - 220 = 80
2 300 200 = 100
2- : 1 360 260 = 100
2 360 224 = 136
) , %
1 (100: 80) × 100% - 100% = 25%
2 (136: 100) × 100% - 100% = 36%
3.
1 
;
2 
: 2, .
