-40.88% is the change from 976 to 577
Calculation steps:
[( 577 - 976 ) ÷ 976] x 100 = -40.88%
Formula
Percentage change = [(577 - 976) / 976] x 100
Subtract the new number by the original number
577 - 976 = -399
-399 ÷ 976 = -0.4088114754098361
-0.4088114754098361 x 100 = -40.88%