-22.65% is the change from 521 to 403
Calculation steps:
[( 403 - 521 ) ÷ 521] x 100 = -22.65%
Formula
Percentage change = [(403 - 521) / 521] x 100
Subtract the new number by the original number
403 - 521 = -118
-118 ÷ 521 = -0.22648752399232247
-0.22648752399232247 x 100 = -22.65%