When we choose abbreviate for some chart it will remove all the decimal, so in the case of 21 500 000 it will show 22M, we would like to be able to keep 1 decimal to show 21.5M.
The other option would be to show the value in the format of Thousands or Millions and keep all the decimal formatting as well, so it will do behind the scene the division by thousands or Millions and add the K or M letters to show that is representing millions.
Could even be used in the worksheet !