Răspuns :
Consideram valoarea veniturilor anuale ca fiind numarul a.
[tex] \frac{4}{100} a=100000\\ 4a=10000000\\ a=10000000:4\\ a=2500000~lei[/tex]
[tex] \frac{4}{100} a=100000\\ 4a=10000000\\ a=10000000:4\\ a=2500000~lei[/tex]