Changing a formula is somehow changing my grouping/link

[mgunnin]

I have 2 tables linked by Client Number with a 1 to Many relationship. I'm trying to determine the Accuracy Rate. The below image is with the following formula in Accuracy Rate - 

       Accuracy Rate = CALCULATE(SUM(BenchmarkTbl[Claim Count])/SUM(BenchmarTbl[TotalTransactions]))

This works, however, the "Accuracy Rate" needs to be...

Accuracy Rate = 1 - CALCULATE(SUM(BenchmarkTbl[Claim Count])/SUM(BenchmarTbl[TotalTransactions]))

But when this change is made, it seems to lose the relationship, just from adding the "1 - ".

Appreciate any assistance.

Thanks.

[mgunnin · Accepted solution]

Substituted the "1" with "Volume/Volume" and it works correclty now.