-47.53% is the change from 486 to 255
Calculation steps:
[( 255 - 486 ) ÷ 486] x 100 = -47.53%
Formula
Percentage change = [(255 - 486) / 486] x 100
Subtract the new number by the original number
255 - 486 = -231
-231 ÷ 486 = -0.47530864197530864
-0.47530864197530864 x 100 = -47.53%