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x*18%=90
x=90/18%
x= 500
270/450*100%=0,6*100%=0,6
72 % - x
72 * 520 37440
_____ = _____ = 374,4
100 100
Odp: 72 % liczby 520 to 374,4.
18 % - 90
100 % - x
100 * 90 9000
_______ = ____ = 500
18 18
Odp: Liczba której 18 % wynosi 90 to 500
450 - 100 %
270 - x
270 * 100 27000
________ = _______ = 60
450 450
Odp: 270 z liczby 450 to 60 %
1.
520 - 100%
x - 72%
z tego x= 374.4
2.
100% - x
18% - 90
z tego x=500
3.
100% - 450
x - 270
z tego x=60