-44.01% is the change from 509 to 285
Calculation steps:
[( 285 - 509 ) ÷ 509] x 100 = -44.01%
Formula
Percentage change = [(285 - 509) / 509] x 100
Subtract the new number by the original number
285 - 509 = -224
-224 ÷ 509 = -0.4400785854616896
-0.4400785854616896 x 100 = -44.01%