Question

Oblicz jakim procentem liczby 20 jest podana liczba:

a) 15

b)30

c)45

d)90

e)150

f)0,2

g)1,6

Answer 1

a)15/20 = 75/100 = 75%

b) 30/20 = 3/2 = 1,5 = 150%    30/20 * 100% = 3/2 * 100% = 1,5 * 100% = 150%

c) 45/20 = 225/100 = 225%    45/20 * 100% = 4500/20% = 450/2% = 225%

d) 90/20 * 100% = 900/2%  = 450%

e) 150/20 * 100% = 15000/20% = 1500%/20 = = 750%

f) 0,2/20 * 100% = 20%/20 = 1%

g) 1,6/20 * 100%= 160%/20 = 8%

Answer 2

a)15

15/20 = 3/4 = 0,75 = 75%

b)30

30/20= 3/2 = 1,5 = 150%

c)45
45/20 = 9/4= 2,25 = 225%
d)90
90/20 = 9/2 = 4,5 = 450%
e)150
150/20= 15/2 = 7,5 = 750%
f)0,2
0,2/20 = 2/200= o,o1 = 1%
g)1,6
1,6/20 = 16/200 = 4/50 = 8/100 = 0,08 = 8%

Answer 3

100%:20=5

15x5=75%

30x5=150%

45x5=225%

90x5=450%

150x5=750%

0,2x5=1%

1,6x5=9%