-18.89% is the change from 831 to 674
Calculation steps:
[( 674 - 831 ) ÷ 831] x 100 = -18.89%
Formula
Percentage change = [(674 - 831) / 831] x 100
Subtract the new number by the original number
674 - 831 = -157
-157 ÷ 831 = -0.18892900120336945
-0.18892900120336945 x 100 = -18.89%