> ## Documentation Index > Fetch the complete documentation index at: https://lightdash-refactor-full-audit-reorg.mintlify.site/llms.txt > Use this file to discover all available pages before exploring further. # Percent of column total > The percent of the column total will give you the percentage of each value in the column out of the total sum of the values in the column. A [formula table calculation](/explore/table-calculations/formulas) computes this without hand-written SQL — see the [percent-of-total example](/explore/table-calculations/formulas#examples): `=revenue / SUM(revenue) * 100`. [Just gimme the code! ](#here’s-the-sql-you-can-copy-paste-to-calculate-the-percent-of-the-column-total) Here's an example of a percent of the total column:

And here's the SQL used in the table calculation: ```sql theme={null} ${orders.total_order_amount} / SUM(${orders.total_order_amount}) OVER() ``` In general, the SQL used for calculating the percent of the total has just one important column: * `column_i_want_to_see_the_percent_of_total` - this is the column that you want to see each value's percent of the total values in that column ### Here's the SQL you can copy-paste to calculate the percent of the column total ```sql theme={null} ${table.column_i_want_to_see_the_percent_of_total} / SUM(${table.column_i_want_to_see_the_percent_of_total}) OVER() ``` ### Make sure to add percent formatting to your calculation In the `format` tab, make sure to update the format to `percent` so that your table calculation is shown as a percentage value (instead of a number).