-82.92% is the change from 521 to 89
Calculation steps:
[( 89 - 521 ) ÷ 521] x 100 = -82.92%
Formula
Percentage change = [(89 - 521) / 521] x 100
Subtract the new number by the original number
89 - 521 = -432
-432 ÷ 521 = -0.8291746641074856
-0.8291746641074856 x 100 = -82.92%