-60.84% is the change from 521 to 204
Calculation steps:
[( 204 - 521 ) ÷ 521] x 100 = -60.84%
Formula
Percentage change = [(204 - 521) / 521] x 100
Subtract the new number by the original number
204 - 521 = -317
-317 ÷ 521 = -0.6084452975047985
-0.6084452975047985 x 100 = -60.84%