-59.33% is the change from 509 to 207
Calculation steps:
[( 207 - 509 ) ÷ 509] x 100 = -59.33%
Formula
Percentage change = [(207 - 509) / 509] x 100
Subtract the new number by the original number
207 - 509 = -302
-302 ÷ 509 = -0.593320235756385
-0.593320235756385 x 100 = -59.33%