-3.04% is the change from 263 to 255
Calculation steps:
[( 255 - 263 ) ÷ 263] x 100 = -3.04%
Formula
Percentage change = [(255 - 263) / 263] x 100
Subtract the new number by the original number
255 - 263 = -8
-8 ÷ 263 = -0.030418250950570342
-0.030418250950570342 x 100 = -3.04%