-56.97% is the change from 509 to 219
Calculation steps:
[( 219 - 509 ) ÷ 509] x 100 = -56.97%
Formula
Percentage change = [(219 - 509) / 509] x 100
Subtract the new number by the original number
219 - 509 = -290
-290 ÷ 509 = -0.5697445972495089
-0.5697445972495089 x 100 = -56.97%