-62.31% is the change from 849 to 320
Calculation steps:
[( 320 - 849 ) ÷ 849] x 100 = -62.31%
Formula
Percentage change = [(320 - 849) / 849] x 100
Subtract the new number by the original number
320 - 849 = -529
-529 ÷ 849 = -0.6230859835100118
-0.6230859835100118 x 100 = -62.31%