-19.42% is the change from 520 to 419
Calculation steps:
[( 419 - 520 ) ÷ 520] x 100 = -19.42%
Formula
Percentage change = [(419 - 520) / 520] x 100
Subtract the new number by the original number
419 - 520 = -101
-101 ÷ 520 = -0.19423076923076923
-0.19423076923076923 x 100 = -19.42%