-58.35% is the change from 509 to 212
Calculation steps:
[( 212 - 509 ) ÷ 509] x 100 = -58.35%
Formula
Percentage change = [(212 - 509) / 509] x 100
Subtract the new number by the original number
212 - 509 = -297
-297 ÷ 509 = -0.5834970530451866
-0.5834970530451866 x 100 = -58.35%