-40.31% is the change from 970 to 579
Calculation steps:
[( 579 - 970 ) ÷ 970] x 100 = -40.31%
Formula
Percentage change = [(579 - 970) / 970] x 100
Subtract the new number by the original number
579 - 970 = -391
-391 ÷ 970 = -0.40309278350515465
-0.40309278350515465 x 100 = -40.31%