-2.05% is the change from 831 to 814
Calculation steps:
[( 814 - 831 ) ÷ 831] x 100 = -2.05%
Formula
Percentage change = [(814 - 831) / 831] x 100
Subtract the new number by the original number
814 - 831 = -17
-17 ÷ 831 = -0.02045728038507822
-0.02045728038507822 x 100 = -2.05%