Odpowiedź :
460 lizakow * 20 gr. = 9200 gr. = 92 zl
92 zl - 100%
x - 5 %
x= 5*92/100 = 4,6 zl
92 zl - 4,6 zl = 87,4 zl
92 zl - 100%
x - 5 %
x= 5*92/100 = 4,6 zl
92 zl - 4,6 zl = 87,4 zl