-19.54% is the change from 522 to 420
Calculation steps:
[( 420 - 522 ) ÷ 522] x 100 = -19.54%
Formula
Percentage change = [(420 - 522) / 522] x 100
Subtract the new number by the original number
420 - 522 = -102
-102 ÷ 522 = -0.19540229885057472
-0.19540229885057472 x 100 = -19.54%