-50.29% is the change from 509 to 253
Calculation steps:
[( 253 - 509 ) ÷ 509] x 100 = -50.29%
Formula
Percentage change = [(253 - 509) / 509] x 100
Subtract the new number by the original number
253 - 509 = -256
-256 ÷ 509 = -0.5029469548133595
-0.5029469548133595 x 100 = -50.29%