Odpowiedź :
25%*2300=25/100*2300/1 (skracam 2300 do 23, 100 do 1)=575/1=575
30%*2300=30/100*2300/1 (skracam 2300 do 23, 100 do 1)=690/1=690
30%*2300=30/100*2300/1 (skracam 2300 do 23, 100 do 1)=690/1=690