.NET (Core and Framework)

var mytotal = _context.Apiapplicant.Where(c => !c.ApiRequestDate.Equals("") && c.IsDeleted.Equals(false)).GroupBy(o => new
            {
                Month = o.ApiRequestDate.Substring(5, 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.Apiapplicant
                            join t2 in _context.ApiApplicantHistory on t1.Id equals t2.ApiApplicantId
                            join t3 in _context.EntityType on t2.LastReqStatus equals t3.Id
                            //join t4 in mytotal on new { t2.Date.Substring(0,4), t2.Date.Substring(2,5) } equals new { t4.Year, t4.Month }
                            // join t4 in mytotal on  t2.Date.Substring(2, 5) equals t4.Month

                            where t1.IsDeleted == false && t3.Name == "granted" && t2.Date != null && t1.ApiRequestNo != null

                            group t1
                            by new
                            {
                                lastReq = t2.LastReqStatus,
                                Year = t2.Date.Substring(0, 4),
                                Month = t2.Date.Substring(5, 2)
                            } into g

                            select new
                            {
                                Year = g.Key.Year,
                                Month = g.Key.Month,
                                lastReq = g.Key.lastReq,
                                GrantedCount = g.Count()
                            };


            var GrantedReqStatus = numerator.OrderByDescending(x => x.Year).ThenByDescending(a => a.Month).ToList();

var LastGrantedStatus = (from t1 in mytotal
                                    from t2 in GrantedReqStatus
                                    where (t1.Month == t2.Month) && (t1.Year == t2.Year)
                                    group t1
                            by new
                            {
                                //  lastReq = t2.LastReqStatus,
                                Year = t1.Year,
                                Month = t1.Month
                            } into g
                                    select new {  Month=g.Key.Month, Year=g.Key.Year,grcount = g.Count()}).ToList();

Console.WriteLine("LastGrantedStatus.Count:" + LastGrantedStatus.Count);
            foreach (var t in LastGrantedStatus)
            {
                Console.WriteLine("t.GrantedCount + t.Month:" + t.Month + "+" + t.grcount); //+ "+" + t. + "+" + t.Year);
            }