-56.7% is the change from 977 to 423
Calculation steps:
[( 423 - 977 ) ÷ 977] x 100 = -56.7%
Formula
Percentage change = [(423 - 977) / 977] x 100
Subtract the new number by the original number
423 - 977 = -554
-554 ÷ 977 = -0.5670419651995906
-0.5670419651995906 x 100 = -56.7%