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⅜×1000=375 - pierwsza klasa
1,08×375= 405 - druga klasa
Odpowiedz: 405
2. 1000-375-405=220 - 3 klasa
11
⁻⁻⁻ ×100%= 5%
220
Odpowiedz: 5%
375 -100%
x - 8%
x=(8*375)\100= 3000\100= 30
375+30 =405
1000-(375+405)=1000-780=220
220-11=209
220 - 100%
209 - x
x=(209*100)\220=20900\220=95%