-73.77% is the change from 976 to 256
Calculation steps:
[( 256 - 976 ) ÷ 976] x 100 = -73.77%
Formula
Percentage change = [(256 - 976) / 976] x 100
Subtract the new number by the original number
256 - 976 = -720
-720 ÷ 976 = -0.7377049180327869
-0.7377049180327869 x 100 = -73.77%