SWITCH + SELECTEDVALUE function doesn't work

Hi jkoclejda 

Using a DIVIDE function will return a blank value if the denominator is zero or empty, which is a better approach than using the / operator sign.

Please try the following:

statement =
SWITCH(
SELECTEDVALUE(table_name[category]),

"percentage margin", DIVIDE([margin], [income]),

SUM(table_name[value])
)

[margin] = CALCULATE(SUM(table_name[value]), table_name[category] = "margin")
[income] = CALCULATE(SUM(table_name[value]), table_name[category] = "income")

================= OR ===================

statement =
SWITCH(
SELECTEDVALUE(table_name[category]),

"percentage margin", IF(ISBLANK([margin]) || ISBLANK([income]), BLANK(), DIVIDE([margin], [income])),

SUM(table_name[value])
)

[margin] = CALCULATE(SUM(table_name[value]), table_name[category] = "margin")
[income] = CALCULATE(SUM(table_name[value]), table_name[category] = "income")

See relevant solution on stackoverflow

https://stackoverflow.com/questions/64438710/can-we-calculate-a-measure-with-percentage-in-power-bi-matrix

Please let me know if this help.

Thanks

Babatunde Dallas