-62.72% is the change from 684 to 255
Calculation steps:
[( 255 - 684 ) ÷ 684] x 100 = -62.72%
Formula
Percentage change = [(255 - 684) / 684] x 100
Subtract the new number by the original number
255 - 684 = -429
-429 ÷ 684 = -0.6271929824561403
-0.6271929824561403 x 100 = -62.72%