▁round ing ▁method ▁was ▁ever ▁a ▁standard ▁in ▁bank ing , ▁the ▁evidence ▁has ▁proved ▁extremely ▁difficult ▁to ▁find . ▁To ▁the ▁contrary , ▁section ▁ 2 ▁of ▁the ▁European ▁Commission ▁report ▁The ▁Introduction ▁of ▁the ▁Euro ▁and ▁the ▁R ounding ▁of ▁C urrency ▁Am ount s ▁suggests ▁that ▁there ▁had ▁previously ▁been ▁no ▁standard ▁approach ▁to ▁round ing ▁in ▁bank ing ; ▁and ▁it ▁spec ifies ▁that ▁" half - way " ▁amounts ▁should ▁be ▁rounded ▁up . ▁ ▁Until ▁the ▁ 1 9 8 0 s , ▁the ▁round ing ▁method ▁used ▁in ▁floating - point ▁computer ▁arithmetic ▁was ▁usually ▁fixed ▁by ▁the ▁hardware , ▁poor ly ▁documented , ▁incons istent , ▁and ▁different ▁for ▁each ▁brand ▁and ▁model ▁of ▁computer . ▁This ▁situation ▁changed ▁after ▁the ▁IE EE ▁ 7 5 4 ▁floating - point ▁standard ▁was ▁adopted ▁by ▁most ▁computer ▁manufact ur ers . ▁The ▁standard ▁allows ▁the ▁user ▁to ▁choose ▁among ▁several ▁round ing ▁modes , ▁and ▁in ▁each ▁case ▁spec ifies ▁precisely ▁how ▁the ▁results ▁should ▁be ▁rounded . ▁These ▁features ▁made ▁numerical ▁comput ations ▁more ▁predict able ▁and ▁machine - in dependent , ▁and ▁made ▁possible ▁the ▁efficient ▁and ▁consistent ▁implementation ▁of ▁interval ▁arithmetic . ▁ ▁Currently , ▁much ▁research ▁tends ▁to ▁round ▁to ▁multi ples ▁of ▁ 5 ▁or ▁ 2 . ▁For ▁example , ▁J ör g ▁B aten ▁used ▁age ▁heap ing ▁in ▁many ▁studies , ▁to ▁evaluate ▁the ▁numer acy ▁level ▁of ▁ancient ▁populations . ▁He ▁came ▁up ▁with ▁the ▁AB CC