-64.44% is the change from 509 to 181
Calculation steps:
[( 181 - 509 ) ÷ 509] x 100 = -64.44%
Formula
Percentage change = [(181 - 509) / 509] x 100
Subtract the new number by the original number
181 - 509 = -328
-328 ÷ 509 = -0.6444007858546169
-0.6444007858546169 x 100 = -64.44%