Odpowiedź :
a) 20 - 25% * 20 = 20 - 25/100 * 20 = 20 - 5 = 15
b) 50 - 20% * 50 = 50 * 20/100 * 50 = 50 - 10 = 40
c) 200 - 1% * 200 = 200 - 1/100 * 200 = 200 - 2 = 198
A
x=20-(25%z20)=20-(0,25*20)=20-5=15
B
x=50-(20%z50)=50-0,2*50=50-10=40
C
x=200-(1%z200)=200-0,01*200=200-2=198