-40.74% is the change from 977 to 579
Calculation steps:
[( 579 - 977 ) ÷ 977] x 100 = -40.74%
Formula
Percentage change = [(579 - 977) / 977] x 100
Subtract the new number by the original number
579 - 977 = -398
-398 ÷ 977 = -0.40736949846468784
-0.40736949846468784 x 100 = -40.74%