-42.16% is the change from 880 to 509
Calculation steps:
[( 509 - 880 ) ÷ 880] x 100 = -42.16%
Formula
Percentage change = [(509 - 880) / 880] x 100
Subtract the new number by the original number
509 - 880 = -371
-371 ÷ 880 = -0.42159090909090907
-0.42159090909090907 x 100 = -42.16%