Odpowiedzi

2009-11-28T15:33:41+01:00
2000 - 100%
x - 3%

x= 3*2000/100
x= 60


1200 - 100%
x - 70%

x= 1200*70/100
x= 840

24000 - 100%
x - 1,5%

x = 24000*1,5/100
x= 360


60 - 100%
x - 33 ⅓%

x= 60 * 33 ⅓/100
x= 19,98

Znajdz liczbę której:

a)
20% = 40
100% = x
x= 100*40/20
x=200
b)
10% = 2,5
100% = x
x= 100*2,5/10
x= 25
c)
4% = 8
100% = x
x= 100*8/4
x= 200
d)
12% = 3,6
100% = x
x= 100*3,6/12
x= 360/12
x= 30
2009-11-28T15:36:11+01:00
1)

3%*2000=3/100*2000=60

70%*1200=70/100*1200=840

1,5%*24000=1,5/100*24000=0,015*24000=360

33⅓%*60=10000/3*60=19,98

2)

20/100x=40
x=200

10/100x=2,5
x=25

4/100x=8
x=200

12/100x=3,6
x=30