-95.39% is the change from 521 to 24
Calculation steps:
[( 24 - 521 ) ÷ 521] x 100 = -95.39%
Formula
Percentage change = [(24 - 521) / 521] x 100
Subtract the new number by the original number
24 - 521 = -497
-497 ÷ 521 = -0.9539347408829175
-0.9539347408829175 x 100 = -95.39%