-91.17% is the change from 521 to 46
Calculation steps:
[( 46 - 521 ) ÷ 521] x 100 = -91.17%
Formula
Percentage change = [(46 - 521) / 521] x 100
Subtract the new number by the original number
46 - 521 = -475
-475 ÷ 521 = -0.9117082533589251
-0.9117082533589251 x 100 = -91.17%