-43.39% is the change from 507 to 287
Calculation steps:
[( 287 - 507 ) ÷ 507] x 100 = -43.39%
Formula
Percentage change = [(287 - 507) / 507] x 100
Subtract the new number by the original number
287 - 507 = -220
-220 ÷ 507 = -0.4339250493096647
-0.4339250493096647 x 100 = -43.39%