. . .
.
1. 72℅, 20℅ . 20 ?
:
| 20 | 72% | 28% | |
| ? () | 20% | 80% |
) :
)
= 7()
: 7
2. 50 30% , 10%?
:
| 50 | 70% | 30% | |
| ?() | 80% | 10% |
) :
= 15()
) :
) 150 50 =100()-
: 100
3. . 3:5. 12 , . ?
:
() , (3) , (5) .
, 12 , , :
5 3 = 12
2 = 12
= 6 6
(3 + 5) 
()-
: 48
:
1. 150, 40%. , 15%?
2. . 3:2. 1,3 , . .
3. 450 8% . , 10 .
.
1. . 1, , 6 , . , , 23 . .
:
(10 + ) ,
6(10 + ) = 10 + 60 + 6 = 10 + 2 = 12 = 6
10 + = 23( ) => 10 + = 23 23 => 2 3 = 0 => = 9
10 
+ 6 = 96 ( )
: 96
:
1. 8, 6 , . 27 , , . .
2. 7, 3 , . , , 27 , . .
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