Question

Trei numere sunt proportinale cu 25% ,20% respectiv 15% din suma lor.Ce fractie din suma reprezinta fiecare numar?

Answer 1

a+b+c=S
25%+20%+15%=60%=60/100=3/5
a/(25S/100)=b/(20S/100)=c/(15S/100)=S/(60S/100)

a/(S/4)=b/(S/5)=c/(3S/20)=S/(3S/5)
a/(S/4)=b/(S/5)=c/(3S/20)=5/3

a=S/4 * 5/3 =5S/12
   
b=S/5 * 5/3 =S/3

c=3S/20 * 5/3 =S/4