-9.02% is the change from 521 to 474
Calculation steps:
[( 474 - 521 ) ÷ 521] x 100 = -9.02%
Formula
Percentage change = [(474 - 521) / 521] x 100
Subtract the new number by the original number
474 - 521 = -47
-47 ÷ 521 = -0.09021113243761997
-0.09021113243761997 x 100 = -9.02%