Budgeting what if with negatives and percentages

[JVMPT64]

Thank you for looking at this.
I'm trying to do some "what if" budgeting exercices and stuck with negative numbers and percentages...
Could anyone help with a formula or macro to solve column C (result), matching the numeric examples in annex?
The idea is to affect a budget value (negative or positive) with a percentage to get a result (column C).
I would be gratefull.

Thanks,

JM

[mcmahobt]

I'm not sure what all your data would look like, but would something like this work?

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and drag down

[JVMPT64]

It works fine and it's all I need. Thank you very much.

JM