-53.72% is the change from 551 to 255
Calculation steps:
[( 255 - 551 ) ÷ 551] x 100 = -53.72%
Formula
Percentage change = [(255 - 551) / 551] x 100
Subtract the new number by the original number
255 - 551 = -296
-296 ÷ 551 = -0.5372050816696915
-0.5372050816696915 x 100 = -53.72%