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2009-11-26T19:25:30+01:00
A) 70% = 21
100 = x

x= 2100: 70 = 30

b) 320% = 640
100% = x

x= 64000:320 = 200

c) 3% = 60
100% = x

x= 6000:3 = 2000

d) 0,2% = 7,4
100% = x

x= 740:0,2 = 3700
2009-11-26T19:29:27+01:00
A) 70% 21
100% x

100 * 21= 2100

2100:70= 30

c) 3% 60
100% x
100*60=6000
6000;3=2000
d)0,2% 7,4
100% x
100*7,4=740
740;0,2=3700
2009-11-26T19:31:45+01:00
A) 70% - 21
100% - x
70x = 2100 | : 70
x = 30
B) 320% - 640
100% - x
320x = 64000
x = 200
C) 3% - 60
100% - x
3x = 6000
x = 2000
D) 0,2% - 7,4
100% - x
0,2x = 740
x = 3700