To add another row at the bottom of the table, Tristan should follow a sequence that allows him to create a new entry below the last existing row. The detailed steps are:
1. Navigate to the last cell in the table, where the value is 8.8 under the "Percentage" column.
2. Move the insertion point (cursor) to the end of this number (8.8).
3. Ensure that the insertion point is positioned immediately after the last character in the cell content, i.e., after the digit 8.
4. Press the Enter key to create a new row directly beneath the current one.
Thus, Tristan needs to put the insertion point at the end of 8.8 and press the Enter key.