-30.84% is the change from 509 to 352
Calculation steps:
[( 352 - 509 ) ÷ 509] x 100 = -30.84%
Formula
Percentage change = [(352 - 509) / 509] x 100
Subtract the new number by the original number
352 - 509 = -157
-157 ÷ 509 = -0.30844793713163066
-0.30844793713163066 x 100 = -30.84%