Explicație pas cu pas:
326,75x(15/100) = 326,75x(3/20) = 980,25/20 = 49,0125 ≅ 49 ;
3274,25x(26/100) = 3274,25x(13/50) = 42565,25/50 = 851,305 ≅ 851 ;
628,45x(98/100) = 628,45x(49/50) = 30794,05/50 = 615,881 ≅ 616 ;
12,55x(4/100) = 12,55x(1/25) = 12,55/25 = 0,502 ≅ 0,5 ;