Odpowiedzi

2010-02-01T15:49:56+01:00
A) 160 ----------- 100%
20 ------------ x%

2000 : 160 = 12,5 %

b) 20----------100%
3,8 ---------- x%

380 : 20= 19 %

c) 45-------100%
54-------- x%

5400 : 45 = 120 %

d) 50------------ 100%
115--------------x%

11500 : 50 = 230 %
___
2 1 2
2010-02-01T16:37:00+01:00
A.) a = 160 b = 20
100%----160
x-----20

x=100*20/160
x=12,5%

b.) a = 20 b = 3,8
100%---20
x----3,8

x=100*3,8/20
x=19%

c.) a = 45 b = 54
100%---45
x---54

x=100*54/45
x=120%

d.) a = 50 b = 115
100%---50
x----115

x=100*115/50
x=230%
1 4 1