Add percentage to whole column

Hey!! I want to add a percentage to a whole column without copy and pasting it to another column. eg get 15% more on a1, on a2 and etc. Any idea?? I know this is might too simple but cannot find the answer

Originally Posted by 6StringJazzer

If you want to add 15% to all numbers, first type 1.15 into a cell. Then Copy that cell. Then select the cells you want to change, and Paste, Paste Special, Multiply.

Really really thank you!!!