-94.43% is the change from 521 to 29
Calculation steps:
[( 29 - 521 ) ÷ 521] x 100 = -94.43%
Formula
Percentage change = [(29 - 521) / 521] x 100
Subtract the new number by the original number
29 - 521 = -492
-492 ÷ 521 = -0.944337811900192
-0.944337811900192 x 100 = -94.43%