-29.19% is the change from 877 to 621
Calculation steps:
[( 621 - 877 ) ÷ 877] x 100 = -29.19%
Formula
Percentage change = [(621 - 877) / 877] x 100
Subtract the new number by the original number
621 - 877 = -256
-256 ÷ 877 = -0.2919042189281642
-0.2919042189281642 x 100 = -29.19%