since 5 equals 12 ur gonna divide the 12 into 3 split in in hakves then it will get u to 6 ow with 6 divide by 7 then aadd 8 the 8 will round up to 10 then 10 u have to split so thats 5 then 5 is gonna go intpo 9 then 9 will be divided into 7 so 9 divided by 7 is 1 2/7 now u take that and divide by 2 which is 0.2 then add 50 then subtract 50 then youll gett .2 then minus the 2 then u get 0.