Ratio of Sums
The comparison between the sum of a selected measure divided by the sum of the selected reference measure.
The formula:
Ratio of Sums = sum(selected measure) / sum(selected reference measure)
Sample
Given the sample data:
| Region | Store | Actual | Target | 
| North | A | $1,300 | $2,000 | 
| North | B | $750 | $1,000 | 
| North | C | $2,100 | $3,000 | 
| South | D | $4,700 | $4,000 | 
| South | E | $2,000 | $2,000 | 
Sample fields
Creating a Table visualization with Breakdowns Region and Store with subtotals and grand totals produces:
| Region | Store | Actual | Target | 
| North | A | $1,300 | $2,000 | 
| B | $750 | $1,000 | |
| C | $2,100 | $3,000 | |
| North Total | $4,150 | $6,000 | |
| South | D | $4,700 | $4,000 | 
| E | $2,000 | $2,000 | |
| South Total | $6,700 | $6,000 | |
| Grand Total | $10,850 | $12,000 | 
Setting the Column to Actual and the Reference Column to Target with the format set to 0.00% results to the following Ratio of Sums values:

| Region | Store | Actual | Target | Ratio of Sums | 
| North | A | $1,300 | $2,000 | 65.00% | 
| B | $750 | $1,000 | 75.00% | |
| C | $2,100 | $3,000 | 70.00% | |
| North Total | $4,150 | $6,000 | 69.17% | |
| South | D | $4,700 | $4,000 | 117.50% | 
| E | $2,000 | $2,000 | 100.00% | |
| South Total | $6,700 | $6,000 | 111.67% | |
| Grand Total | $10,850 | $12,000 | 90.42% | 
Results per row
Computation details:
North A: $1,300 / $2,000 = 65.00%
    North B: $750 / $1,000 = 75.00%
    North C: $2,100 / $3,000 = 70.00%
    North Total: $4,150 / $6,000 = 69.17%
    South D: $4,700 / $4,000 = 117.50%
    South E: $2,000 / $2,000 = 100.00%
    South Total: $6,700 / $6,000 = 111.67%
    Grand Total: $10,850 / $12,000 = 90.42%
Collapsing the North region results to the following Ratio of Sums values:
| Region | Store | Actual | Target | Ratio of Sums | 
| North Total | $4,150 | $6,000 | 69.17% | |
| South | D | $4,700 | $4,000 | 117.50% | 
| E | $2,000 | $2,000 | 100.00% | |
| South Total | $6,700 | $6,000 | 111.67% | |
| Grand Total | $10,850 | $12,000 | 90.42% | 
Result per row
The rest of the computation details are the same except for the collapsed North region:
North = ($1,300 + $750 + $2,100) / ($2,000 + $1,000 + $3,000) = 69.17%
Or
North = $4,150 / $6,000 = 69.17%
Collapsing the South region results to the following Ratio values:
| Region | Actual | Target | Ratio of Sums | 
| North | $4,150 | $6,000 | 69.17% | 
| South | $6,700 | $6,000 | 111.67% | 
| Grand Total | $10,850 | $12,000 | 90.42% | 
Results per row
The computation details for the collapsed South region:
South = ($4,700 + $2,000) / ($4,000 + $2,000) = 111.67%
Or
South = $6,700 / $6,000 = 111.67%
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