Question

oblicz jakim procentem liczby 20 jest: 90 , 150, 0,2 , 1,6

Answer 1

 

 

a) 90/20 ·100% = 900/2%  = 450%

b) 150/20 ·100% = 15000/20% = 1500%/20 = 750%

c) 0,2/20 ·100% = 20%/20 = 1%

d) 1,6/20 ·100%= 160%/20 = 8%

Answer 2

ROZWIĄZANIE:

90/20*100%=450%
150/20*100%=750%

0,2/20*100% =1%

1,6/20*100%=8%

 

lub jak wolisz to tak:

wyjaśnienie:

--- oznacza myślnik

 

90----X

20---100%

20x=90*100%

20X=9000%

x=9000%/20

X=450%

 

150---x

20---100%

20x=150*100%

20x=15000%

x=15000%/20

x=750%

 

0,2---x

20---100%

20x=0,2*100%

20x=20

x=20%/20

x=1%

 

1,6---x

20---100%

20x=1,6*100%

20x=160%

x=160%/20

x=8%