Need help to develop a % formula

[cajun-bob]

Greetings,

I'm hoping someone may be able to help me.

I have developed a workbook to track my portfolio on a weekly basis. One
component of my portfolio is my "Line of Credit" which always contain
negative values.

For example, last week I had a -$5,000 balance and this week I have a
-$6,000 balance. The week over week change is -$1,000 or -20%.
Presently, my workbook correctly reflects the -$1,000 weekly change but
shows the percentage change as a positive (rather than a negative) 20% weekly
change. The formula for weekly % change that I am using is as follows:
=+(B421-B420)/B420 (where B421 is this week's negative balance of -$6,000
and B420 is last week's negative balance of -$5,000.)

Could you please tell me how to change the formula (or anything else) so
that my workbook will reflect the -20% weekly change?

By the way, the formula I am using to determine my $ weekly change is simply:
=+B421-B420

Thank you.

 

[David Biddulph]

Firstly you don't need a + at the beginning of your formulae.
=+(B421-B420)/B420 is the same as =(B421-B420)/B420
=+B421-B420 is the same as =B421-B420

If you want to change the sign of your answer, change =(B421-B420)/B420 to
=(B420-B421)/B420 or =(B421-B420)/-B420 or =-(B421-B420)/B420 or
=(B421-B420)/ABS(B420) or ...

Note that your current formula is correctly showing the change a percentage
of the original value.
-$1000 is indeed 20% of -$5000, not -20%, but if you want -20%, just change
the sign as shown above.