-19.61% is the change from 510 to 410
Calculation steps:
[( 410 - 510 ) ÷ 510] x 100 = -19.61%
Formula
Percentage change = [(410 - 510) / 510] x 100
Subtract the new number by the original number
410 - 510 = -100
-100 ÷ 510 = -0.19607843137254902
-0.19607843137254902 x 100 = -19.61%