Zadanie 1 sposób I
[tex] \frac{5}{20} \times 100\% = \frac{1}{4} \times 100\% = 0.25 \times 100\% = 25\%[/tex]
sposób II
20 -- 100%
1 -- 5%
5 -- 25%
Zadanie 2
sposób I
80%=720
x =100%
[tex]x = \frac{100\% * (720)}{80 \%} = \frac{72000}{80} = 900[/tex]
sposób II
720 -- 80%
90 -- 10%
900 -- 100%
Zadanie 3.
sposób I
[tex] \frac{19}{24} \times 100\% = \frac{19 \times 100}{24} \% = \frac{1900}{24} \% = 79 \frac{4}{24} \% = 79 \frac{1}{6\%} [/tex]
sposób II
24 -- 100%
1 -- 100/24%
5 -- 500/24 %
5 --20 20/24= 20 5/6
19 -- 100-20 5/6=79 1/6%
Zadanie 4
150--75%
50--25%
200--100%
