-64.66% is the change from 812 to 287
Calculation steps:
[( 287 - 812 ) ÷ 812] x 100 = -64.66%
Formula
Percentage change = [(287 - 812) / 812] x 100
Subtract the new number by the original number
287 - 812 = -525
-525 ÷ 812 = -0.646551724137931
-0.646551724137931 x 100 = -64.66%