-64.49% is the change from 521 to 185
Calculation steps:
[( 185 - 521 ) ÷ 521] x 100 = -64.49%
Formula
Percentage change = [(185 - 521) / 521] x 100
Subtract the new number by the original number
185 - 521 = -336
-336 ÷ 521 = -0.6449136276391555
-0.6449136276391555 x 100 = -64.49%