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80, bo 88:110×100=0,8×100=80
50, bo 50:100×72= 0,5×72=36
x=63:0,7
x=90
x*110=88
x=88:110
x=0,8=80%
0,5*72=36
70% liczby 90 wynosi 63
80% liczby 110 wynosi 88
50% liczby 72 wynosi 36