How to configure an absence with 2 plans where deduction happens from both plans

Summary:

Need to configure an absence which will have 2 plans where absence will be deducted 50-50% from both the plans simultaneously. It means if employee applies for 1 day leave then absence should be deducted 0.5 days each from both the plans. Please let me know how to achieve this?

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Version (include the version you are using, if applicable): 25D

Code Snippet (add any code snippets that support your topic, if applicable):