-17.84% is the change from 510 to 419
Calculation steps:
[( 419 - 510 ) ÷ 510] x 100 = -17.84%
Formula
Percentage change = [(419 - 510) / 510] x 100
Subtract the new number by the original number
419 - 510 = -91
-91 ÷ 510 = -0.1784313725490196
-0.1784313725490196 x 100 = -17.84%