-19.25% is the change from 509 to 411
Calculation steps:
[( 411 - 509 ) ÷ 509] x 100 = -19.25%
Formula
Percentage change = [(411 - 509) / 509] x 100
Subtract the new number by the original number
411 - 509 = -98
-98 ÷ 509 = -0.1925343811394892
-0.1925343811394892 x 100 = -19.25%