-0.95% is the change from 838 to 830
Calculation steps:
[( 830 - 838 ) ÷ 838] x 100 = -0.95%
Formula
Percentage change = [(830 - 838) / 838] x 100
Subtract the new number by the original number
830 - 838 = -8
-8 ÷ 838 = -0.00954653937947494
-0.00954653937947494 x 100 = -0.95%