-44.91% is the change from 521 to 287
Calculation steps:
[( 287 - 521 ) ÷ 521] x 100 = -44.91%
Formula
Percentage change = [(287 - 521) / 521] x 100
Subtract the new number by the original number
287 - 521 = -234
-234 ÷ 521 = -0.4491362763915547
-0.4491362763915547 x 100 = -44.91%