Răspuns :
16400:100x115=18860
18860+18860:3==
18860+6286.66=25146.66 este noul pret
18860+18860:3==
18860+6286.66=25146.66 este noul pret
15\100*16400=15*164=820
16400+820=17.220
1\3*17220=5740
17220-5740=11480 noul pret
/=impartire *=inmultire