-65.52% is the change from 812 to 280
Calculation steps:
[( 280 - 812 ) ÷ 812] x 100 = -65.52%
Formula
Percentage change = [(280 - 812) / 812] x 100
Subtract the new number by the original number
280 - 812 = -532
-532 ÷ 812 = -0.6551724137931034
-0.6551724137931034 x 100 = -65.52%