-40.63% is the change from 977 to 580
Calculation steps:
[( 580 - 977 ) ÷ 977] x 100 = -40.63%
Formula
Percentage change = [(580 - 977) / 977] x 100
Subtract the new number by the original number
580 - 977 = -397
-397 ÷ 977 = -0.406345957011259
-0.406345957011259 x 100 = -40.63%