Răspuns:
a)in prima etapa
15000*20/100=300000/100=3000piese
in a doua etapa
15000-3000=12000
12000*50/100=600000/100=6000piese
in a treia etapa
15000-3000-6000=12000-6000=6000piese
b) 15000*x/100=6000
x=6000*100/15000
x=600000/15000=40 %
c)6000*100/3000=600000/3000=200%
Explicație pas cu pas: