-63.37% is the change from 838 to 307
Calculation steps:
[( 307 - 838 ) ÷ 838] x 100 = -63.37%
Formula
Percentage change = [(307 - 838) / 838] x 100
Subtract the new number by the original number
307 - 838 = -531
-531 ÷ 838 = -0.6336515513126492
-0.6336515513126492 x 100 = -63.37%