Odpowiedź:
40 - 100%
x - 15%
x= 40 × 15 ÷ 100 = 6
15% z 40zł to 6 zł
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Odpowiedź:
40 - 100%
x - 15%
x= 40 × 15 ÷ 100 = 6
15% z 40zł to 6 zł