-19.57% is the change from 511 to 411
Calculation steps:
[( 411 - 511 ) ÷ 511] x 100 = -19.57%
Formula
Percentage change = [(411 - 511) / 511] x 100
Subtract the new number by the original number
411 - 511 = -100
-100 ÷ 511 = -0.19569471624266144
-0.19569471624266144 x 100 = -19.57%