-39.51% is the change from 977 to 591
Calculation steps:
[( 591 - 977 ) ÷ 977] x 100 = -39.51%
Formula
Percentage change = [(591 - 977) / 977] x 100
Subtract the new number by the original number
591 - 977 = -386
-386 ÷ 977 = -0.39508700102354144
-0.39508700102354144 x 100 = -39.51%