-40.52% is the change from 970 to 577
Calculation steps:
[( 577 - 970 ) ÷ 970] x 100 = -40.52%
Formula
Percentage change = [(577 - 970) / 970] x 100
Subtract the new number by the original number
577 - 970 = -393
-393 ÷ 970 = -0.40515463917525774
-0.40515463917525774 x 100 = -40.52%