-73.87% is the change from 976 to 255
Calculation steps:
[( 255 - 976 ) ÷ 976] x 100 = -73.87%
Formula
Percentage change = [(255 - 976) / 976] x 100
Subtract the new number by the original number
255 - 976 = -721
-721 ÷ 976 = -0.7387295081967213
-0.7387295081967213 x 100 = -73.87%