Ania,Basia i Celina zbierają autografy.Ania ma o 40 % więcej niż Basia,ale o 40 % mniej niż Celina.Celina zebrała już 70 autografów.Ile autografów ma Ania,ile Basia ?
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ania 42
basia 33
celina 70
100%-70
60%-?
(60%*70):100%=4200:100=42-autografy ani
42-140%
?-100%
(42*100%):140%=4200:140=30-autografy basi
Odp.Ania ma 42 autografy, a Basia 30 autografy