For example if you want to find the 15 percent of the total sum 3500. Working backward from before divide the percentage by 100 or you can multiply by 001 theyre the exact same. While the SUM function does not exist in Power Query the ListSum.
To calculate percent of a total ie.
CALCULATE SUM Transactionsquantity To get the percentage shown on a pie chart as labels you can choose an item from the Label Style list. In the formula line or directly into the cell enter A1 B1. Go to Home tab. Import of Total var bigTotal SUMX ALL Sheet1 Customer CALCULATE SUM Sheet1 Import SUM Sheet1 Export return DIVIDE SUM ImportbigTotal.