-58.74% is the change from 509 to 210
Calculation steps:
[( 210 - 509 ) ÷ 509] x 100 = -58.74%
Formula
Percentage change = [(210 - 509) / 509] x 100
Subtract the new number by the original number
210 - 509 = -299
-299 ÷ 509 = -0.587426326129666
-0.587426326129666 x 100 = -58.74%