-57.01% is the change from 977 to 420
Calculation steps:
[( 420 - 977 ) ÷ 977] x 100 = -57.01%
Formula
Percentage change = [(420 - 977) / 977] x 100
Subtract the new number by the original number
420 - 977 = -557
-557 ÷ 977 = -0.5701125895598772
-0.5701125895598772 x 100 = -57.01%