-81.57% is the change from 521 to 96
Calculation steps:
[( 96 - 521 ) ÷ 521] x 100 = -81.57%
Formula
Percentage change = [(96 - 521) / 521] x 100
Subtract the new number by the original number
96 - 521 = -425
-425 ÷ 521 = -0.8157389635316699
-0.8157389635316699 x 100 = -81.57%