-19.17% is the change from 506 to 409
Calculation steps:
[( 409 - 506 ) ÷ 506] x 100 = -19.17%
Formula
Percentage change = [(409 - 506) / 506] x 100
Subtract the new number by the original number
409 - 506 = -97
-97 ÷ 506 = -0.191699604743083
-0.191699604743083 x 100 = -19.17%