Combine update stmts into one

How I can combine these two update statement. I tried using a If Else but I received the following error:
Subquery returned more than 1 value. This is not permitted when the subquery follows =, !=, <, <= , >, >= or when the subquery is used as an expression.


Update Revenue
set Difference_Flag = 'Yellow' From Revenue
where ((TY_Revenue - LY_Revenue)/LY_Revenue)*100 = 0
go
Update Revenue
set Difference_Flag = 'Yellow' From Revenue
where ((TY_Revenue - LY_Revenue)/LY_Revenue)*100 = 0
go

Hi,

I don't see the difference between the 2 statements (perhaps I've been staring at the screen too long! so I don't understand what you mean by "combine", as they are the same???

Also, You don't need the "From Revenue" in the code

Update Revenue
set Difference_Flag = 'Yellow'
where ((TY_Revenue - LY_Revenue)/LY_Revenue)*100 = 0
go