Subtract in the indicated base
6153
8
- 3342
8
____________
Do you mean subtract 3342base8 from 6153base8
If so,
6153
3342
last digit 1 (3-2)
second digit (8s) 1 (5-4)
64s digit 6 (1+8borrow-3)
128s digit 1 (6-1borrowed-3)
answer: 2611 base8
you can check your calculations here..
http://www.cleavebooks.co.uk/scol/calnumba.htm