-83.53% is the change from 838 to 138
Calculation steps:
[( 138 - 838 ) ÷ 838] x 100 = -83.53%
Formula
Percentage change = [(138 - 838) / 838] x 100
Subtract the new number by the original number
138 - 838 = -700
-700 ÷ 838 = -0.8353221957040573
-0.8353221957040573 x 100 = -83.53%