-19.81% is the change from 838 to 672
Calculation steps:
[( 672 - 838 ) ÷ 838] x 100 = -19.81%
Formula
Percentage change = [(672 - 838) / 838] x 100
Subtract the new number by the original number
672 - 838 = -166
-166 ÷ 838 = -0.19809069212410502
-0.19809069212410502 x 100 = -19.81%