SSRS matrix report totals: Can I use total counts of two columns instead of average of percent total

I am using SSRS 2014. I'm using a matrix instead of a tablix because it allows me to have dynamic columns. In the example I'm showing, two of the columns that use the sum function to get the total counts per practice. The third column contains percentages so I averaged but the value is inaccurate compared to the value I would get if the divided the the two totals that are sums of the counts. Is there a way for me to specify that I want to divide the total counts numerator divided by the total counts denominator?Here's an example report output with the percentage column averaged (inaccurate):PCP numerator denominator percentageJohn Smith 66 104 63.46Tom Jones 4 36 11.11...Jane Doe 1 1 100Total 708 1005 72.3So the 72.3 value is from Avg(metricvalue)I would like to do this instead: % total = 708/1005, which equals 70.5 - a significant difference.The metricvalue column is what is the value for every number above (Because it's a matrix).Can I do this? Please let me know if you need additional information from me or if I have been unclear.Thanks in advance!