-8.45% is the change from 521 to 477
Calculation steps:
[( 477 - 521 ) ÷ 521] x 100 = -8.45%
Formula
Percentage change = [(477 - 521) / 521] x 100
Subtract the new number by the original number
477 - 521 = -44
-44 ÷ 521 = -0.08445297504798464
-0.08445297504798464 x 100 = -8.45%