-61.81% is the change from 838 to 320
Calculation steps:
[( 320 - 838 ) ÷ 838] x 100 = -61.81%
Formula
Percentage change = [(320 - 838) / 838] x 100
Subtract the new number by the original number
320 - 838 = -518
-518 ÷ 838 = -0.6181384248210023
-0.6181384248210023 x 100 = -61.81%