-27.83% is the change from 521 to 376
Calculation steps:
[( 376 - 521 ) ÷ 521] x 100 = -27.83%
Formula
Percentage change = [(376 - 521) / 521] x 100
Subtract the new number by the original number
376 - 521 = -145
-145 ÷ 521 = -0.2783109404990403
-0.2783109404990403 x 100 = -27.83%