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V = 6³
V = 216 [cm³]
33 i 1/3% = 1/3
216 x 1/3 = 72
216 - 72 = 144
216 --- 100%
144 --- x%
216x = 144 x 100
216x = 14400 /:216
x = 66 i 2/3 %
100% - 66 i 2/3% = 33 i 1/3%
Odp. Objętość zmaleje o 33 i 1/3%.