-89.83% is the change from 521 to 53
Calculation steps:
[( 53 - 521 ) ÷ 521] x 100 = -89.83%
Formula
Percentage change = [(53 - 521) / 521] x 100
Subtract the new number by the original number
53 - 521 = -468
-468 ÷ 521 = -0.8982725527831094
-0.8982725527831094 x 100 = -89.83%