-72.78% is the change from 812 to 221
Calculation steps:
[( 221 - 812 ) ÷ 812] x 100 = -72.78%
Formula
Percentage change = [(221 - 812) / 812] x 100
Subtract the new number by the original number
221 - 812 = -591
-591 ÷ 812 = -0.7278325123152709
-0.7278325123152709 x 100 = -72.78%