-59.72% is the change from 633 to 255
Calculation steps:
[( 255 - 633 ) ÷ 633] x 100 = -59.72%
Formula
Percentage change = [(255 - 633) / 633] x 100
Subtract the new number by the original number
255 - 633 = -378
-378 ÷ 633 = -0.5971563981042654
-0.5971563981042654 x 100 = -59.72%