-29.86% is the change from 509 to 357
Calculation steps:
[( 357 - 509 ) ÷ 509] x 100 = -29.86%
Formula
Percentage change = [(357 - 509) / 509] x 100
Subtract the new number by the original number
357 - 509 = -152
-152 ÷ 509 = -0.29862475442043224
-0.29862475442043224 x 100 = -29.86%