-22.46% is the change from 521 to 404
Calculation steps:
[( 404 - 521 ) ÷ 521] x 100 = -22.46%
Formula
Percentage change = [(404 - 521) / 521] x 100
Subtract the new number by the original number
404 - 521 = -117
-117 ÷ 521 = -0.22456813819577734
-0.22456813819577734 x 100 = -22.46%