Hej!
[tex]1] \ 15\% \ z \ 50=0,15\cdot50=\boxed{7,5}\\\\2] \ 24\% \ z \ 50=0,24\cdot50=\boxed{12}\\\\3] \ 4\% \ z \ 80=0,04\cdot80=\boxed{3,2}\\\\4] \ 20\% \ z \ 400=0,2\cdot400=\boxed{80}[/tex]
