-62.39% is the change from 678 to 255
Calculation steps:
[( 255 - 678 ) ÷ 678] x 100 = -62.39%
Formula
Percentage change = [(255 - 678) / 678] x 100
Subtract the new number by the original number
255 - 678 = -423
-423 ÷ 678 = -0.6238938053097345
-0.6238938053097345 x 100 = -62.39%