Question

From the below query I am struggling to get the Failure Percentage as it is always coming as zero. Am I doing something wrong.

from n in calculateOrderStatus
group n by new { n.OrderDate.Date, n.OrderDate.Hour } into h
select new 
{
    Failed = h.Sum(n => n.Failed), 
    Success = h.Sum(n => n.Success),
    FailurePercentage = (h.Sum(n => n.Failed) /  h.Sum(n => n.Success))  * 100
}

Answer 1

You’re doing integer division, not floating point: therefore dividing Failed by Success will always give you zero if Failed < Success. Multiply Failed by 100 first, then divide by Success.

i.e. FailurePercentage = 100 * h.Sum(n => n.Failed) / h.Sum(n => n.Success)