-47.5% is the change from 581 to 305
Calculation steps:
[( 305 - 581 ) ÷ 581] x 100 = -47.5%
Formula
Percentage change = [(305 - 581) / 581] x 100
Subtract the new number by the original number
305 - 581 = -276
-276 ÷ 581 = -0.4750430292598967
-0.4750430292598967 x 100 = -47.5%