-90.02% is the change from 521 to 52
Calculation steps:
[( 52 - 521 ) ÷ 521] x 100 = -90.02%
Formula
Percentage change = [(52 - 521) / 521] x 100
Subtract the new number by the original number
52 - 521 = -469
-469 ÷ 521 = -0.9001919385796545
-0.9001919385796545 x 100 = -90.02%