reporting services - ssrs calculate share % devide by total of column -


i've got matrix in ssrs:

custname     monthsales     share % abc          1000           50% def          500            25% ghi          500            25% total        2000           100%

so custname row group. i'm trying calculate share % follows:

=fields!monthsales.value /  sum(fields!monthsales.value, "custname")

but keep getting 100%

i should have taken dataset scope:

=fields!monthsales.value /  sum(fields!monthsales.value, "dataset1")

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