Odpowiedzi

2010-04-14T18:51:39+02:00
20 000zł=100%
22 200zł=x%
.................
x=22200×100:20000
x=111%

oprocentowanie wynosi:111-100=11%
2010-04-14T18:51:47+02:00
20000-100%
22200-x%
X=22200*100/20000
X=111%
111%-100%=11%