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cat reprezinta 20% din 40%​

Răspuns :

 

[tex]\displaystyle\bf\\20\%~din~40\%=\\\\=20\%~\times~40\%=\\\\=\frac{20}{100}\times\frac{40}{100}=\\\\=\frac{20\times40}{100\times100}=\\\\=\frac{800}{10000}=\\\\=\frac{8}{100}=\boxed{\bf8\%}[/tex]