Below is my code: I am calling it via trigger(After insert, After Update)
I am creating Opportunity Split automatically when Team Member with role 'MRVL' is getting added. I need to split the team members equally which will be divided among them in 25% of share, becuase 75% should be for opportunity owner. But i am getting error:

Upsert failed. First exception on row 1 with id 0496C000000K2xDQAS; first error: FIELD_INTEGRITY_EXCEPTION, Can't update splits: percentages don't add up to 100.00%.: []: Class.Opportunitysplithandler.opptysplit: line 35, column 1  

Please Help: If my logic is wrong...


public class Opportunitysplithandler {    
    public static void opptysplit(Map<Id,OpportunityTeamMember> oppty){
        
        List<OpportunityTeamMember> oppteam = new List<OpportunityTeamMember>() ;
        List<OpportunitySplit> oppSplit = new List<OpportunitySplit>();
        set<Id> oppId = new Set<Id>();
        
        For(OpportunityTeamMember OTM : oppty.values()){
            if (OTM.TeamMemberRole.contains('MRVL')){
                oppteam.add(OTM);  
                oppId.add(OTM.OpportunityId);
            }               
        }        
           
        List<OpportunitySplit> oppSpl = [select Id, opportunityId  from OpportunitySplit where opportunityId In :oppId];
        system.debug('Pratibha here'+oppteam);
        
        if(oppteam.size() >0){
            Decimal percentageShare = 25/(oppteam.size()+oppSpl.size()); //this will calculate the %age share for each team member
            for(OpportunityTeamMember newotm : oppteam){
                OpportunitySplit os = new OpportunitySplit();
                os.OpportunityId = newotm.opportunityId ; 
                os.SplitOwnerId = newotm.UserId;
                os.SplitPercentage = percentageShare;
                oppSplit.add(os);
            }       
            
        }
        for(OpportunitySplit old : oppSpl){
            
                Decimal percentageShare = 25/(oppteam.size()+oppSpl.size());
                old.SplitPercentage = percentageShare;
                oppSplit.add(old);
        }
                
        upsert oppSplit;
    }
    
    
}