-9.21% is the change from 521 to 473
Calculation steps:
[( 473 - 521 ) ÷ 521] x 100 = -9.21%
Formula
Percentage change = [(473 - 521) / 521] x 100
Subtract the new number by the original number
473 - 521 = -48
-48 ÷ 521 = -0.09213051823416507
-0.09213051823416507 x 100 = -9.21%