Performance Tuning :: Remove Table Fragmentation

I have tried below steps for removing the table fregmentation but for some table i am not getting good result here.

1. It will collect the data which are having more than 100MB fragmentation.

select owner,table_name,blocks,num_rows,avg_row_len,round(((blocks*8/1024)),2)||'MB' "TOTAL_SIZE", round((num_rows*avg_row_len
/1024/1024),2)||'Mb' "ACTUAL_SIZE", round(((blocks*8/1024)-(num_rows*avg_row_len/1024/1024)),2) ||'MB' "FRAGMENTED_SPACE" from
dba_tables where owner in('a','b','c','d') and round(((blocks*8/1024)-(num_rows*avg_row_len/1024/1024)),2)
> 100 order by 8 desc;

2. then move the object(table) to the same tablespace.

alter table abc move;
alter table bcd move;
alter table efg move;

3. also rebuild the dependent objects.

alter index abc_PK rebuild online;

4. Then analyze the table which are having more than 100MB of fragmentation.

exec dbms_stats.gather_table_stats('a','abc');
exec dbms_stats.gather_table_stats('b','bcd');
exec dbms_stats.gather_table_stats('c','cdf');

after that when check the table fragmentation, i am getting the same result, which i have collected from the 1st query.