-18.84% is the change from 828 to 672
Calculation steps:
[( 672 - 828 ) ÷ 828] x 100 = -18.84%
Formula
Percentage change = [(672 - 828) / 828] x 100
Subtract the new number by the original number
672 - 828 = -156
-156 ÷ 828 = -0.18840579710144928
-0.18840579710144928 x 100 = -18.84%