-42.99% is the change from 977 to 557
Calculation steps:
[( 557 - 977 ) ÷ 977] x 100 = -42.99%
Formula
Percentage change = [(557 - 977) / 977] x 100
Subtract the new number by the original number
557 - 977 = -420
-420 ÷ 977 = -0.42988741044012285
-0.42988741044012285 x 100 = -42.99%