-63.52% is the change from 836 to 305
Calculation steps:
[( 305 - 836 ) ÷ 836] x 100 = -63.52%
Formula
Percentage change = [(305 - 836) / 836] x 100
Subtract the new number by the original number
305 - 836 = -531
-531 ÷ 836 = -0.6351674641148325
-0.6351674641148325 x 100 = -63.52%