-81.26% is the change from 838 to 157
Calculation steps:
[( 157 - 838 ) ÷ 838] x 100 = -81.26%
Formula
Percentage change = [(157 - 838) / 838] x 100
Subtract the new number by the original number
157 - 838 = -681
-681 ÷ 838 = -0.8126491646778043
-0.8126491646778043 x 100 = -81.26%