Question

Znajdź liczbę, której: a). 3% wynosi 120 b). 23% wynosi 4,6 c). 250% wynosi 12 d). 105% wynosi 21 e). 20% wynosi 400 f). 35% wynosi 70 g). 13% wynosi 52 h). 220% wynosi 44 i). 71% wynosi 7,1 j). 17% wynosi 51

Answer 1

a) 3% - 120

    100% - x

x = 120*100/3 = 12000/3 = 4000

 

b) 23% - 4,6

    100% - x

x = 4,6*100/23 = 460/23 = 20

 

c) 250% - 12

  100% - x

x = 12*100/250 = 1200/250 = 4,8

 

d) 105% - 21

    100% - x

x = 21*100/105 = 2100/105 = 20

 

e) 20% - 400

    100% - x

x = 400*100/20 = 40000/20 = 2000

 

f) 35% - 70

   100% - x

x = 70*100/35 = 7000/35 = 200

 

g) 13% - 52 

   100% - x

x = 52*100/13 = 5200/13 = 400

 

h) 220% - 44

    100% - x

x = 44*100/220 = 4400/220 = 20

 

i) 71% - 7,1

  100% - x

x = 7,1*100/71 = 710/71 = 10

 

j) 17% - 51

   100% - x

x = 51*100/17 = 5100/17 = 300

Answer 2

a). 

3%-120

100%-x

x=100*120/3

x=400

b).

23% - 4,6

100%-x

x=100*4,6/23

x=460/23

x=20

c).

250% - 12

100%-x

x=100*12/250

x=1200/250

x=4,8

d).

105%- 21

100%-x

x=100*21/105

x=2100/105

x=20

e).

20% -400

100%-x

x=100*400/20

x=40000/20

x=20000

f).

35% - 70

100%-x

x=100*70/35

x=7000/35

x=200

g).

13% - 52

100%-x

x=100*52/13

x=400

h).

220% - 44

100%-x

x=100*44/220

x=4400/220

x=2

i).

71% -7,1

100%-x

x=100*7,1/71

x=710/71

x=10

j).

17%- 51

100%-x

x=100*51/17

x=300