Odpowiedź :
1.
[tex]140 - 100\% \\ 203 - x \\ \\ x = \frac{203 \times 100}{140} = \frac{20300}{140} = 145\%[/tex]
[tex]145\% - 100\% = 45\%[/tex]
[tex] \boxed{ \boxed{Odp.B}}[/tex]
2.
[tex]189 + 140 + 203 = 532 \\ \\ 532 \div 7 = 76[/tex]
[tex] \boxed{ \boxed{Odp.C}}[/tex]
Odpowiedź:
1/
140 - 100%
203 - x%
x = (203×100) ÷ 140 = 20300 ÷ 140 = 145
145 - 100 = 45%
B. 45%
2/
189 + 140 + 203 = 532
532 ÷ x = 7
532 = 7x
x = 532 ÷ 7
x = 76
C. 76 uczniów