Răspuns :
a) 15= p/100 x 450 => p= 15x100/450 =3.33 => 3.33%
b) 220 = p/100 x 60 => p= 366.66
c) 14= p/100 x 420 => p= 3.33
b) 220 = p/100 x 60 => p= 366.66
c) 14= p/100 x 420 => p= 3.33