-53.1% is the change from 838 to 393
Calculation steps:
[( 393 - 838 ) ÷ 838] x 100 = -53.1%
Formula
Percentage change = [(393 - 838) / 838] x 100
Subtract the new number by the original number
393 - 838 = -445
-445 ÷ 838 = -0.5310262529832935
-0.5310262529832935 x 100 = -53.1%