Wiek Kasi stanowi 32% wieku jej cioci, co stanowi 40% wieku taty Kasi.Oblicz, w jakim wieku jest Kasia i jej tata, jeżeli ciocia ma 50 lat.
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50 lat -100%
x lat - 32%
x=50 lat*32%/100%
x=16 lat ma Kasia
16 lat - 40%
x lat - 100%
x=16lat*100%/40%
x=40 lat ma tata
100% - 50
32% - X
32% * 50
X= 100% = 16
100% - X
40% - 16
100% * 16
X= 40% = 40
Odp: Kasia ma 16 lat, a jej tata 40.