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, , . , , .
, (. . , ).
, . , , 15-20%, - 0-5%.
, . 10-15 , 10 , , .
. , 10 12 – 2 . 20%.
, , , , . , , :
()
76
100
18
27
( ) 10 % 5 % :
= – 10% = 100 – 100 10% = 90 .
= – 10% = 76 – 76 10% = 68,4 .
= – 5% = 27 – 27 5% = 25,6 .
= – 5% = 18 – 18 5% = 17,1 .
1. , : = = 25,6 .
= 1/10 – 1 = 1/10 100 – 1 = 9
, , .
2. : 1 = 1/4 = 1/4 90 = 22,5 .
1 , 1.
3. 1 = = 17,1
4. 2 = 1/4 = 1/4 68,4 = 17,1
2 – .
5. 8 , 2 6 .
= 8 , 21 = 6 .
1.
6. : 12 = 4 .
7. : = 1 = 1/4 (1/10 – 1 ) = 1/4 (1/10 100 – 1 ) = 2,25
: 2 = 13 = 3,5 .
2 3 1 .
, .
2.
8. 1 , 1 .
9. , 1,5 (. . , 1,5 ).
10. , .
11. 7 , 0,75 , . .
12. 8 . , .
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