-2.89% is the change from 831 to 807
Calculation steps:
[( 807 - 831 ) ÷ 831] x 100 = -2.89%
Formula
Percentage change = [(807 - 831) / 831] x 100
Subtract the new number by the original number
807 - 831 = -24
-24 ÷ 831 = -0.02888086642599278
-0.02888086642599278 x 100 = -2.89%