To calculate the percentage of accuracy in Excel, you can use the following formula:

Where B4 is the number of errors and C4 is the total number of widgets created.

This formula subtracts the percentage of errors from 100% to get the percentage of accuracy.

1. You can enter this formula in a new cell and it will automatically calculate the percentage of accuracy based on the values in B4 and C4.
2. If you want to hide the extra column, you can simply right-click on the column header and select "Hide". This will hide the column from view, but the formula will still work in the background.