-60.47% is the change from 812 to 321
Calculation steps:
[( 321 - 812 ) ÷ 812] x 100 = -60.47%
Formula
Percentage change = [(321 - 812) / 812] x 100
Subtract the new number by the original number
321 - 812 = -491
-491 ÷ 812 = -0.604679802955665
-0.604679802955665 x 100 = -60.47%