-18.23% is the change from 521 to 426
Calculation steps:
[( 426 - 521 ) ÷ 521] x 100 = -18.23%
Formula
Percentage change = [(426 - 521) / 521] x 100
Subtract the new number by the original number
426 - 521 = -95
-95 ÷ 521 = -0.18234165067178504
-0.18234165067178504 x 100 = -18.23%