znajdz liczbę której 84%wynosi 513 wynik zaokrąglij do 0,1
84%----513
100%----x
84x----51300/:84
x=610,71428571~610,7
84%x=513
0,84x=513 /:0,84
x≈610,7
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84%----513
100%----x
84x----51300/:84
x=610,71428571~610,7
84%x=513
0,84x=513 /:0,84
x≈610,7