-19.13% is the change from 831 to 672
Calculation steps:
[( 672 - 831 ) ÷ 831] x 100 = -19.13%
Formula
Percentage change = [(672 - 831) / 831] x 100
Subtract the new number by the original number
672 - 831 = -159
-159 ÷ 831 = -0.19133574007220217
-0.19133574007220217 x 100 = -19.13%