Display progress percentage using SignalR in ASP.Net Core

Hi,

i canot notify to client the method that read from a dbContext and write to another with SignalR.

If i replace a simple for loop to test all works fine 

but with my method not

private async Task SyncTablesJobAsync(string jobId, ICollection<string> tables)
{
    int processed = 0;           
    using (var scope = _scopeFactory.CreateScope())
    {
        var appDbCtx = scope.ServiceProvider.GetService<ApplicationDbContext>();
        var companyDbCtx = scope.ServiceProvider.GetService<CompanyDbContext>();
 
        foreach (var table in tables)
        {
            switch (table)
            {
                case "agenti":
                    await FillAgenti(appDbCtx, companyDbCtx);
                    processed++;
                    break;
                case "rubrica":
                    await FillRubrica(appDbCtx, companyDbCtx);
                    processed++;
                    break;
              ...
            }
            await _hubContext.Clients.Group(jobId).SendAsync("progress", (processed / tables.Count) * 100);
        }
    }
}
 
private async Task FillAgenti(ApplicationDbContext appDbCtx, CompanyDbContext companyDbCtx)
{
    var agents = await new Agent(companyDbCtx).GetAgentsAsync();
    var agenteRepository = new AgenteRepository(appDbCtx, _mapper);
    await agenteRepository.RemoveAllAgentiAsync();
    await agenteRepository.AddAgentiAsync(
    await agenteRepository.FillAgentiFromCompanyAsync(agents));
}

why can't display percentage of progress? what i wrong?