Răspuns :
24360 :21000=1,16
9000x1,16=10440 lei primeste Radu
12000x1,16=13620 lei primeste Anton
9000x1,16=10440 lei primeste Radu
12000x1,16=13620 lei primeste Anton
21000×X/100=9000<=>210X=9000=> X=9000÷210=42,85% a contribuit Radu.
100-42,85=57,15% a contribuit Anton;
24360×42,85/100=10 438,26lei va primi Radu;
24360-10438,26=13 921,74lei va primi Anton.