Problem with iterating over two lists simultaneously - linq

Question

I'm using ASP.NET Core 3.1. I have written some code like the following and now I want to get the result of these two queries that has the same size and iterate over each one of them and divide their element and store the result in a list. But now the problem is in my zip method, I can not specify exactly which attribute of each query I want to divide.
var mytotal = _context.Apiapp.GroupBy(o => new
{
Month = o.ApiRequestDate.Substring(4, 2),
Year = o.ApiRequestDate.Substring(0, 4)
}).Select(g => new
{
Month = g.Key.Month,
Year = g.Key.Year,
Total = g.Count()
}).OrderByDescending(a => a.Year).ThenByDescending(a => a.Month).ToList();
var numerator = from t1 in _context.Apiapp
join t2 in _context.ApiAppHistory on t1.Id equals t2.ApiApplicantId
join t3 in _context.EntityType on t2.LastReqStatus equals t3.Id
where t1.IsDeleted == false && t1.LastRequestStatus == t2.Id && t3.Name == "granted"
group new { Year = t1.ApiRequestDate.Substring(0, 4), Month = t1.ApiRequestDate.Substring(4, 2) }
by new { t2.LastReqStatus } into g
select new
{
Year = g.Max(n => n.Year),
Month = g.Max(n => n.Month),
GrantedCount = g.Count()
};
var GrantedReqStatus = numerator.ToList();
var GrantedAccessPercent = new List<Double>();
//-------------------------------------------------------
var res = mytotal.Zip(GrantedReqStatus, (total, GrantedCount) => new { Num = total, Denum = GrantedCount });
foreach(var r in res)
{
GrantedAccessPercent.Add(r.Num/r.Denum);
}
Here inside the body of foreach, r.Num and r.Denum is unknown! I appreciate of any help to fix the error.

Answer 1

The Num and DemNum in the Zip function represent objects for the first and second collection, that contains Month,Year and Total for the total object and Month,Year and GrantedCount for the grantedCount object.
You could use total.Total and grantedCount.GrantedCount to get numbers, like the following code:
var res = mytotal.Zip(GrantedReqStatus, (total, grantedCount) => new { Num = total.Total, Denum = grantedCount.GrantedCount });
foreach(var r in res)
{
GrantedAccessPercent.Add(Math.Round(r.Num / (double)r.DemNum, 2));
}
Note that, to divide int1/int2 you need to cast int2 to double, Will give the expected result, and you can use also Math.Round to specify numbers after comma.
I hope this help you fix the issue.