-49.52% is the change from 521 to 263
Calculation steps:
[( 263 - 521 ) ÷ 521] x 100 = -49.52%
Formula
Percentage change = [(263 - 521) / 521] x 100
Subtract the new number by the original number
263 - 521 = -258
-258 ÷ 521 = -0.4952015355086372
-0.4952015355086372 x 100 = -49.52%