How to divide values using the total of a column - powerbi

Question

Below is a small snippet of my data. Now i want to create a new column %ofSales that takes the total of every sub_group_name and divides it with every value in the column of that sub group.
For example, the first value of the new column would be
(303370.88/186391.46)*100

Answer 1

Lets use this example data
category,subcategory,sales
1, a, 2
1, b, 4
1, c, 5
1, d, 6
2, a, 3
2, b, 4
2, c, 2
2, d, 5
Add calculated columns
catSales =
var temp = Table2[category]
return CALCULATE(sum(Table2[sales]),all(Table2),Table2[category]=temp)
%ofSales = Table2[sales]/Table2[catSales]
Or use equivalent measures instead.
Result:
category,subcategory,sales,catSales,%ofSales
1, a, 2, 17, 0.11764705882352941
1, b, 4, 17, 0.23529411764705882
1, c, 5, 17, 0.29411764705882354
1, d, 6, 17, 0.35294117647058826
2, a, 3, 14, 0.21428571428571427
2, b, 4, 14, 0.2857142857142857
2, c, 2, 14, 0.14285714285714285
2, d, 5, 14, 0.35714285714285715
Edit: equivalent measure:
%ofSales2 =
var temp = FIRSTNONBLANK(Table2[category],1)
return
SUM(Table2[sales])/
CALCULATE(sum(Table2[sales]),
ALLSELECTED(Table2),
Table2[category]=temp)