-67.75% is the change from 521 to 168
Calculation steps:
[( 168 - 521 ) ÷ 521] x 100 = -67.75%
Formula
Percentage change = [(168 - 521) / 521] x 100
Subtract the new number by the original number
168 - 521 = -353
-353 ÷ 521 = -0.6775431861804223
-0.6775431861804223 x 100 = -67.75%