-61.42% is the change from 521 to 201
Calculation steps:
[( 201 - 521 ) ÷ 521] x 100 = -61.42%
Formula
Percentage change = [(201 - 521) / 521] x 100
Subtract the new number by the original number
201 - 521 = -320
-320 ÷ 521 = -0.6142034548944337
-0.6142034548944337 x 100 = -61.42%