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@c -A, --average report average posting amount

To see the running total changed to a running average, use @option{-A}. The final posting's total will be the overall average of all displayed postings. The works in conjunction with period reporting, so that you can see your monthly average expenses with:

@example ledger -AM reg ^expenses:food ledger -AMn reg ^expenses @end example

This works in the balance report too:

@example ledger -AM bal ^expenses:food ledger -AMs bal ^expenses @end example

@c -D, --deviation report deviation from the average

The @option{-D} option changes the running average into a deviation from the running average. This only makes sense in the register report, however.

@example ledger -DM reg ^expenses:food @end example

@c -%, --percentage report balance totals as a percentile of the parent

In the balance report only, @option{-%} changes the reported totals into a percentage of the parent account. This kind of report is confusing if negative amounts are involved, and doesn't work at all if multiple commodities occur in an account's history. It has a somewhat limited usefulness, therefore, but in certain cases it can be handy, such as reviewing overall expenses:

@example ledger -%s -S T bal ^expenses @end example
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