-61.58% is the change from 833 to 320
Calculation steps:
[( 320 - 833 ) ÷ 833] x 100 = -61.58%
Formula
Percentage change = [(320 - 833) / 833] x 100
Subtract the new number by the original number
320 - 833 = -513
-513 ÷ 833 = -0.6158463385354142
-0.6158463385354142 x 100 = -61.58%